# ![@SumitM_X Avatar](https://lunarcrush.com/gi/w:26/cr:twitter::1403220296375570438.png) @SumitM_X SumitM

SumitM posts on X about api, performance, what is, topics the most. They currently have [------] followers and [---] posts still getting attention that total [-------] engagements in the last [--] hours.

### Engagements: [-------] [#](/creator/twitter::1403220296375570438/interactions)
![Engagements Line Chart](https://lunarcrush.com/gi/w:600/cr:twitter::1403220296375570438/c:line/m:interactions.svg)

- [--] Week [---------] +16%
- [--] Month [----------] +148%
- [--] Months [----------] +1,059%
- [--] Year [----------] +288%

### Mentions: [---] [#](/creator/twitter::1403220296375570438/posts_active)
![Mentions Line Chart](https://lunarcrush.com/gi/w:600/cr:twitter::1403220296375570438/c:line/m:posts_active.svg)

- [--] Week [---] -27%
- [--] Month [---] +118%
- [--] Months [---] +215%
- [--] Year [-----] +39%

### Followers: [------] [#](/creator/twitter::1403220296375570438/followers)
![Followers Line Chart](https://lunarcrush.com/gi/w:600/cr:twitter::1403220296375570438/c:line/m:followers.svg)

- [--] Week [------] +2.80%
- [--] Month [------] +23%
- [--] Months [------] +68%
- [--] Year [------] +113%

### CreatorRank: [------] [#](/creator/twitter::1403220296375570438/influencer_rank)
![CreatorRank Line Chart](https://lunarcrush.com/gi/w:600/cr:twitter::1403220296375570438/c:line/m:influencer_rank.svg)

### Social Influence

**Social category influence**
[technology brands](/list/technology-brands)  9.05% [stocks](/list/stocks)  7.54% [financial services](/list/financial-services)  #351 [countries](/list/countries)  2.01% [finance](/list/finance)  1.01% [exchanges](/list/exchanges)  0.5% [social networks](/list/social-networks)  0.5%

**Social topic influence**
[api](/topic/api) #67, [performance](/topic/performance) #878, [what is](/topic/what-is) 6.53%, [topics](/topic/topics) #885, [systems](/topic/systems) #85, [redis](/topic/redis) #2, [design](/topic/design) #2337, [request](/topic/request) #170, [tools](/topic/tools) 4.02%, [dev](/topic/dev) #242

**Top accounts mentioned or mentioned by**
[@ashokumar89](/creator/undefined) [@surajgoraicse](/creator/undefined) [@codewiddan](/creator/undefined) [@patilvishi](/creator/undefined) [@anantshah133](/creator/undefined) [@devxritesh](/creator/undefined) [@hydradominatis](/creator/undefined) [@the_designnn](/creator/undefined) [@buildaditya](/creator/undefined) [@alifeaftertech](/creator/undefined) [@tamecalm](/creator/undefined) [@krunalexplores](/creator/undefined) [@umesh__digital](/creator/undefined) [@nisha_gowdaa](/creator/undefined) [@abdelrazzak_dev](/creator/undefined) [@ashutosh_1205](/creator/undefined) [@0xlr8_jdev](/creator/undefined) [@avrldotdev](/creator/undefined) [@fruglelocal](/creator/undefined) [@i_found_myself_](/creator/undefined)

**Top assets mentioned**
[Accenture (ACN)](/topic/accenture) [Boston Scientific Corporation (BSX)](/topic/boston-scientific) [Alphabet Inc Class A (GOOGL)](/topic/$googl)
### Top Social Posts
Top posts by engagements in the last [--] hours

"This is what going to the office in Bangalore looks like. Just [--] kms from the fancy Embassy Tech Village"  
[X Link](https://x.com/SumitM_X/status/1978334159434088449)  2025-10-15T05:36Z 39.6K followers, 379.3K engagements


"Authorization: Bearer token This header has two parts: Authorization = Auth Scheme + token Scheme : How should I verify you Token : The actual proof Bearer means: Anyone who "bears" (has) this token is trusted HTTP itself doesnt force Bearer From a pure HTTP perspective this is also valid: Authorization: anything-you-want But In OAuth 2.0- Most frameworks gateways below format is compulsory: Authorization: Bearer access_token Without Bearer - No OAuth2 Most frameworks will reject the request. If the server is custom-built it can accept raw tokens but most real-world systems require the Bearer"  
[X Link](https://x.com/SumitM_X/status/2019781457968058489)  2026-02-06T14:33Z 39.6K followers, 15.9K engagements


"Tech Lead tells you to "Just return [---] OK and put the error in the response body. Easier for frontend." What's your reply"  
[X Link](https://x.com/SumitM_X/status/2021255416525553840)  2026-02-10T16:10Z 39.6K followers, 105.5K engagements


"In [----] I joined Infosys at [----] LPA. In [----] They are offering [---] LPA"  
[X Link](https://x.com/SumitM_X/status/2021419312167399749)  2026-02-11T03:01Z 39.6K followers, 87.7K engagements


"@DovySimuMMA Jubli will do the same to Gamrot imo. Ufc is protecting Gamrot"  
[X Link](https://x.com/SumitM_X/status/2022532297103413398)  2026-02-14T04:44Z 39.6K followers, [---] engagements


"Common query . Which course should I buy Simple answer. If you want to invest for future- invest in System Design and AI courses rather than DSA . If you need to change NOW or in next 1-2 months.can Go for DSA"  
[X Link](https://x.com/SumitM_X/status/2022533042901012851)  2026-02-14T04:47Z 39.6K followers, [----] engagements


"Infosys raises Q3FY26 bonus payout to 85% after steady quarterly improvement . Infosys variable pay has steadily improved over recent quarters rising from about 65-80% and now averaging around 85% in Q3FY26"  
[X Link](https://x.com/SumitM_X/status/2022642592710824067)  2026-02-14T12:02Z 39.6K followers, [----] engagements


"I have launched four digital products via Topmate and Gumroad so far . Given the constant inquiries through DMs for purchase links I have decided to consolidate all relevant links in one place for your convenience. Individual Products: Cracking The Java Interview With Sumit: Topmate: Gumroad: Cracking the MERN Interviews: Topmate: Gumroad: Cracking The Reactjs Interviews: Topmate: Gumroad: Cracking The React Native Interviews: Topmate: Gumroad: Bundle Offers: All in One Bundle (Java + Reactjs + MERN + React Native): Topmate: (Java + Reactjs + MERN): Topmate: Gumroad: Reactjs + MERN Bundle:"  
[X Link](https://x.com/SumitM_X/status/1903387545196748988)  2025-03-22T10:05Z 39K followers, 175.9K engagements


"SELECT * FROM users WHERE salary = NULL; SELECT * FROM users WHERE salary IS NULL; Are both these queries same"  
[X Link](https://x.com/anyuser/status/1916538997817454986)  2025-04-27T17:04Z 39.2K followers, 62.3K engagements


"Was asked in Boston Scientific:"  
[X Link](https://x.com/SumitM_X/status/2001263562745082006)  2025-12-17T12:09Z 39.5K followers, [----] engagements


"SELECT COUNT(*) FROM orders; is slow on a [--] M row table. Ok but What faster alternative would you suggest"  
[X Link](https://x.com/SumitM_X/status/2009680027164737737)  2026-01-09T17:33Z 38.9K followers, 447.1K engagements


"Backend Interview question that is being asked a lot these days : You are implementing an API that returns users to the client but the database has [--] M(1000000) users How will you return data to the client efficiently"  
[X Link](https://x.com/SumitM_X/status/2015418738900959431)  2026-01-25T13:37Z 39.3K followers, 351.1K engagements


"Best resort in / near Bangalore for [--] day stay"  
[X Link](https://x.com/SumitM_X/status/2015636056180432959)  2026-01-26T04:00Z 39.4K followers, [----] engagements


"As a Reactjs developer Pleasr Learn these [--] topics 👇 [--]. Closures Scope and Hoisting. [--]. Promises and Async/Await. [--]. Event Loop and Callbacks. [--]. Prototypes and Inheritance. [--]. Module Systems (ESM CommonJS). [--]. React Lifecycle and Hooks (useEffect useMemo etc.). [--]. Context API and State Management (Redux Zustand etc.). [--]. React Performance Optimization. [--]. Server-Side Rendering (Next.js). [--]. Dynamic Routing and Code Splitting. [--]. Lazy Loading and Code Splitting. [--]. Critical Rendering Path. [--]. Web Vitals (LCP FID CLS). [--]. Caching Strategies. [--]. CDN Optimization. [--]. Responsive Design."  
[X Link](https://x.com/SumitM_X/status/2016477117715042399)  2026-01-28T11:43Z 39K followers, 28.8K engagements


"Was asked in Accenture :"  
[X Link](https://x.com/SumitM_X/status/2016497046237413494)  2026-01-28T13:02Z 39.1K followers, [----] engagements


"Common React Interview question. What is the problem in this code export default function App() const items = "Apple" "Bat" "Cat"; return ( ul index) = ( li key=indexitem/li )) /ul ); http://items.map http://items.map"  
[X Link](https://x.com/SumitM_X/status/2016551822107005070)  2026-01-28T16:39Z 38.7K followers, 414K engagements


"As a Java developer Please learn: [--]. Core Java Mastery - OOP principles (SOLID DRY KISS) - Generics Lambda expressions Functional interfaces - Java Streams API (map/reduce collectors) - Java Collections framework - Java Reflection API - Exception handling [--]. Multithreading & Concurrency - Thread synchronization Executors Locks - Fork/Join framework - Understanding of race conditions deadlocks and thread pools - Concurrency utilities (java.util.concurrent) [--]. Design Patterns & Architecture - Common design patterns (Singleton Factory Builder) - Architectural patterns (MVC - Microservices"  
[X Link](https://x.com/SumitM_X/status/2017312670568091904)  2026-01-30T19:03Z 38.6K followers, 21.9K engagements


"As a Java developer Please learn: [--]. Core Java Mastery - OOP principles (SOLID DRY KISS) - Generics Lambda expressions Functional interfaces - Java Streams API (map/reduce collectors) - Java Collections framework - Java Reflection API - Exception handling [--]. Multithreading & Concurrency - Thread synchronization Executors Locks - Fork/Join framework - Understanding of race conditions deadlocks and thread pools - Concurrency utilities (java.util.concurrent) [--]. Design Patterns & Architecture - Common design patterns (Singleton Factory Builder) - Architectural patterns (MVC - Microservices"  
[X Link](https://x.com/SumitM_X/status/2017318556837556365)  2026-01-30T19:26Z 39K followers, 36.9K engagements


"You implement a distributed cache (e.g. Redis) in your microservices architecture to improve performance. However during scaling different services update the cache at different points resulting in stale data being served to clients. How would you design a solution to handle cache consistency across multiple services to avoid stale data being served https://twitter.com/i/web/status/2017576874231402572 https://twitter.com/i/web/status/2017576874231402572"  
[X Link](https://x.com/SumitM_X/status/2017576874231402572)  2026-01-31T12:33Z 38.6K followers, 17.7K engagements


"Option A or B Which is correct"  
[X Link](https://x.com/SumitM_X/status/2017885769701204132)  2026-02-01T09:00Z 38.6K followers, 63.7K engagements


"Your service suddenly starts returning: [---] Service Unavailable But CPU and memory look fine. What do you investigate next"  
[X Link](https://x.com/SumitM_X/status/2017890829323694237)  2026-02-01T09:20Z 38.9K followers, 58.5K engagements


"One common question that I am seeing in every interview report these days : Your page loads in 80ms in USA but [---] ms in lndia. Same backend. Same code. What would you use to fix this"  
[X Link](https://x.com/SumitM_X/status/2017995084059545963)  2026-02-01T16:14Z 39K followers, 24.5K engagements


"Was asked in Wells Fargo :"  
[X Link](https://x.com/SumitM_X/status/2018025796146016461)  2026-02-01T18:16Z 39K followers, [----] engagements


"JPMorgan Interview Questions shared by [--] years exp candidate- [--]. What are the issue might appear in multithreading [--]. Concurrent Hashmap how it works why is better than synchronised block [--]. how to achieve locking difference between lock and shynchronised"  
[X Link](https://x.com/SumitM_X/status/2018238211123020088)  2026-02-02T08:21Z 39K followers, 24.9K engagements


"Another favorite topic of Java interviewers - Serialization . Set of questions that you can expect - - Transient vs. static vs. final keywords in Serialization - Externalization vs. Serialization - SerialVersionUID - what is Customised Serialization"  
[X Link](https://x.com/SumitM_X/status/2018275397956419821)  2026-02-02T10:48Z 39K followers, [----] engagements


"Your API works fine for page=1100 but becomes extremely slow at page=5000. What exactly is happening under the hood How would you fix this"  
[X Link](https://x.com/SumitM_X/status/2018327307287744771)  2026-02-02T14:15Z 38.6K followers, 52K engagements


"Can primary key be null"  
[X Link](https://x.com/SumitM_X/status/2018515311780303196)  2026-02-03T02:42Z 38.9K followers, 43.9K engagements


"As a developer do you know what is the difference between Git GitHub GitLab and Bitbucket"  
[X Link](https://x.com/SumitM_X/status/2018546508971512284)  2026-02-03T04:46Z 39K followers, 52.8K engagements


"After introducing JWT validation average response time increases by 30%. Where would you start debugging"  
[X Link](https://x.com/SumitM_X/status/2018586804866498827)  2026-02-03T07:26Z 39.2K followers, 50.4K engagements


"You discover a GET API is updating last_accessed timestamps in DB. What is your next step"  
[X Link](https://x.com/SumitM_X/status/2018641020783857985)  2026-02-03T11:01Z 39.3K followers, 37.3K engagements


"A user logs in and gets a JWT. That JWT is passed from Service A - Service B - Service C to complete one request. What is this pattern called Is it secure"  
[X Link](https://x.com/SumitM_X/status/2018691906583028175)  2026-02-03T14:23Z 38.7K followers, 103.7K engagements


"Was asked in NASDAQ INTERVIEW :"  
[X Link](https://x.com/SumitM_X/status/2018720248938328119)  2026-02-03T16:16Z 39K followers, 16.2K engagements


"Was asked in JP Morgan :"  
[X Link](https://x.com/SumitM_X/status/2018724214564663352)  2026-02-03T16:32Z 39K followers, [----] engagements


"When you interview developers in the US earning $100K$300K you slowly realise how underpaid Indian developers are despite having comparable skills"  
[X Link](https://x.com/SumitM_X/status/2018728695637422151)  2026-02-03T16:50Z 39.2K followers, 536.8K engagements


"The good old Java Interview Question .reminds me of 2010s What will be the output static int test() try return 1; finally return 2;  public static void main(String args) System.out.println(test());"  
[X Link](https://x.com/SumitM_X/status/2018923848381743387)  2026-02-04T05:45Z 39.1K followers, 41.2K engagements


"Say we have two threads "Thread1" & "Thread2". If Thread1 is executing in method [--] can Thread2 then execute in method 2"  
[X Link](https://x.com/SumitM_X/status/2019035220658565336)  2026-02-04T13:08Z 39.3K followers, 22.4K engagements


"Aditya Agarwal was Facebook's 10th employee and later CTO of Dropbox. When he says "something I was very good at is now free and abundant" it feels real because he is talking after two decades of deep software experience. Its a calm realization that skills once rare and hard-earned are no longer scarce and today the best coder and the best prompt can reach the same result. Weird times https://twitter.com/i/web/status/2019283243321974834 https://twitter.com/i/web/status/2019283243321974834"  
[X Link](https://x.com/SumitM_X/status/2019283243321974834)  2026-02-05T05:33Z 38.7K followers, 14K engagements


"Exception handling is important for apps and Java interviewers make sure to evaluate it. Some common beginner level questions 👇 - finally vs finalize - classnotfound vs. noclassdeffound - how to create custom exceptions - synchronous vs asynchronous exception handling and when to use what"  
[X Link](https://x.com/SumitM_X/status/2019344129428484585)  2026-02-05T09:35Z 39K followers, [----] engagements


"One row is updated thousands of times per second (eg - likes in viral posts in X). DB CPU spikes. How do you fix this"  
[X Link](https://x.com/SumitM_X/status/2019370797081718932)  2026-02-05T11:21Z 39.4K followers, 10.1K engagements


"3 Beginner level Springboot interview questions that are served as starters: - How to change the packaging from JAR to WAR in a Spring Boot app - How to switch from Tomcat server to Jetty server in a Spring Boot app - How to handle exceptions globally in a Spring Boot app https://twitter.com/i/web/status/2019444886471360541 https://twitter.com/i/web/status/2019444886471360541"  
[X Link](https://x.com/SumitM_X/status/2019444886471360541)  2026-02-05T16:15Z 39.2K followers, 12.1K engagements


"Question is why would any company hire freshers now. Anthropic CEO: Software engineering will be completely obsolete in 6-12 months https://t.co/EwKq8l7HE7 Anthropic CEO: Software engineering will be completely obsolete in 6-12 months https://t.co/EwKq8l7HE7"  
[X Link](https://x.com/SumitM_X/status/2019612042903318733)  2026-02-06T03:20Z 38.6K followers, 72.8K engagements


"Can GET have a request body"  
[X Link](https://x.com/SumitM_X/status/2019614552477036753)  2026-02-06T03:30Z 39.2K followers, 13.9K engagements


"What will be the output and why public class Test public static void main(String args) List extends Number numbers = new ArrayListInteger(); numbers.add(10); System.out.println(numbers);"  
[X Link](https://x.com/SumitM_X/status/2019630768524521858)  2026-02-06T04:34Z 38.6K followers, [----] engagements


"Why do we prefix the token with Bearer instead of sending the token directly"  
[X Link](https://x.com/SumitM_X/status/2019677236010578130)  2026-02-06T07:39Z 39.4K followers, 333.7K engagements


"Is DELETE idempotent"  
[X Link](https://x.com/SumitM_X/status/2019750983320891776)  2026-02-06T12:32Z 38.7K followers, 36.1K engagements


"The Tech Lead says your public API and internal API both should accept the same user JWT. What should be your reply"  
[X Link](https://x.com/SumitM_X/status/2019769947979678022)  2026-02-06T13:47Z 38.9K followers, 61.4K engagements


"Learn like it's a long career. Earn like it's a short career"  
[X Link](https://x.com/SumitM_X/status/2019976349394563103)  2026-02-07T03:27Z 38.6K followers, [----] engagements


"Babar Azam is one of the most overrated batsman ever. He won't be able to make it even to Ranji's in India. Babar Azam's biggest achievement is being compared to Kohli by few people"  
[X Link](https://x.com/SumitM_X/status/2020098232244900132)  2026-02-07T11:32Z 38.6K followers, [----] engagements


"Not good times for Oracle developers"  
[X Link](https://x.com/SumitM_X/status/2020154889637109795)  2026-02-07T15:17Z 38.8K followers, 33K engagements


"Was asked in JP Morgan Interview :"  
[X Link](https://x.com/SumitM_X/status/2020163116932157732)  2026-02-07T15:49Z 39K followers, [----] engagements


"The Tech Lead says that the frontend will send the user role in every request and the backend will use it for authorization decisions. What should be your reply"  
[X Link](https://x.com/SumitM_X/status/2020168412161536464)  2026-02-07T16:10Z 39.2K followers, 74.8K engagements


"Two microservices A and B share the same database for some entities due to legacy design. Microservice A makes a change to the entity but Microservice B does not reflect the change immediately leading to inconsistent behavior. How would you refactor the system to solve the shared database issue without creating downtime https://twitter.com/i/web/status/2020193325429715076 https://twitter.com/i/web/status/2020193325429715076"  
[X Link](https://x.com/SumitM_X/status/2020193325429715076)  2026-02-07T17:49Z 39.2K followers, 38.6K engagements


"As a developer Do you know the difference between Database replication partition and sharding"  
[X Link](https://x.com/SumitM_X/status/2020198639604551972)  2026-02-07T18:11Z 39.1K followers, 34.9K engagements


"90% of Fortune [---] companies still use Java for their core infrastructure"  
[X Link](https://x.com/SumitM_X/status/2020343478371381621)  2026-02-08T03:46Z 39K followers, 10.6K engagements


"As a developer in [----] please be Interview ready.always"  
[X Link](https://x.com/SumitM_X/status/2020370982213677269)  2026-02-08T05:35Z 39K followers, 45.3K engagements


"Python is only for Brahmins and Kshatriyas.lol.😀 No way this is True https://t.co/zjYQL0aVmt https://t.co/zjYQL0aVmt"  
[X Link](https://x.com/SumitM_X/status/2020372017825083395)  2026-02-08T05:40Z 39K followers, [----] engagements


"Table has an index on (user_id created_at). Query : SELECT * FROM orders WHERE created_at '2025-01-01'; Will the index be used or not"  
[X Link](https://x.com/SumitM_X/status/2020434009181036820)  2026-02-08T09:46Z 39K followers, 31.8K engagements


"Java + Reactjs - still the best Full stack combo for Job opportunites"  
[X Link](https://x.com/SumitM_X/status/2020440300536082587)  2026-02-08T10:11Z 39K followers, 68K engagements


"As a Developer Have you asked yourself how Udemy prevents screenshots and screen recordings on mobile and web"  
[X Link](https://x.com/SumitM_X/status/2020464229539606897)  2026-02-08T11:46Z 39K followers, 31.4K engagements


"User updates profile name. DB shows new name. UI still shows the old name. As a developer Can you answer : Where could caching exist How would you guarantee correctness"  
[X Link](https://x.com/SumitM_X/status/2020528580917440672)  2026-02-08T16:02Z 39.1K followers, 20.3K engagements


"Your load balancer is returning [---] for 20% of your traffic . What's your next step"  
[X Link](https://x.com/SumitM_X/status/2020535655793586492)  2026-02-08T16:30Z 39.4K followers, 28.1K engagements


"Is Ind vs Pak happening or not"  
[X Link](https://x.com/SumitM_X/status/2020788154907685140)  2026-02-09T09:13Z 39K followers, [----] engagements


"As a developer have you ever thought why in WhatsApp a message can be deleted for everyone but the notification for that message once popped up cannot be removed from the user's phone"  
[X Link](https://x.com/SumitM_X/status/2020832156256485761)  2026-02-09T12:08Z 39K followers, 27.8K engagements


"What's wrong with this code: function App() return button onClick=alert("Clicked")Click Me/button;"  
[X Link](https://x.com/SumitM_X/status/2020917760545677462)  2026-02-09T17:48Z 39K followers, 24K engagements


"What is the difference between [---] and [---] HTTP code"  
[X Link](https://x.com/SumitM_X/status/2020918955049689570)  2026-02-09T17:53Z 39.4K followers, 61.7K engagements


"@HydraDominatis Nomura"  
[X Link](https://x.com/SumitM_X/status/2021111774360240427)  2026-02-10T06:39Z 39K followers, [---] engagements


"Could be just a code review round where you find out what's wrong in the code and the fix for it. The beginning of the end of Leetcode grinding era. The beginning of the end of Leetcode grinding era"  
[X Link](https://x.com/SumitM_X/status/2021119010453201202)  2026-02-10T07:08Z 39K followers, [----] engagements


"How many of the below [--] Java multithreading concepts do you know : - Lock and ReentrantLock - Semaphore - CyclicBarrier - CountDownLatch - Exchanger - Phaser - Executors - ThreadPoolExecutor - ThreadsFactory - Fork-Join Pool"  
[X Link](https://x.com/SumitM_X/status/2021119946781282661)  2026-02-10T07:12Z 39K followers, [----] engagements


"When I joined Twitter . Tech Twitter was full of css and js is tricky jokes. That tech twitter era ended for good"  
[X Link](https://x.com/SumitM_X/status/2021162589590307217)  2026-02-10T10:01Z 39K followers, [----] engagements


"You are tasked with updating an existing microservice API without breaking backward compatibility for current consumers. What API versioning strategy would you use and how would you implement it"  
[X Link](https://x.com/SumitM_X/status/2021192610493366361)  2026-02-10T12:00Z 39K followers, 15.9K engagements


"Tech Lead tells you that for API request: GET /userspage=1&pageSize=0 Treat pageSize = [--] as return all records. Whats your reply"  
[X Link](https://x.com/SumitM_X/status/2021614332459487330)  2026-02-11T15:56Z 39.4K followers, 19.2K engagements


"Just FYI - Alphabet made $400 billion in [----]. And still told employees: adapt to AI or walk away. If one of the richest tech company GOOGLE has zero patience now for who are not adapting. What's your next step"  
[X Link](https://x.com/SumitM_X/status/2021807149035516051)  2026-02-12T04:42Z 39.4K followers, 14.2K engagements


"I typed and stopped. But the other user could see my account "typing" for [--] seconds. What could have gone wrong"  
[X Link](https://x.com/SumitM_X/status/2021935462823371068)  2026-02-12T13:12Z 39.4K followers, [----] engagements


"Do pain relief gels like Volini help in muscle recovery also or are just for reducing pain"  
[X Link](https://x.com/SumitM_X/status/2022172141421310092)  2026-02-13T04:53Z 39.5K followers, [----] engagements


"As a backend engineer. Please learn: - GraphQL/ REST - Docker - System Design - Algorithms - API design - CI/CD - DS - DB Stop jumping from one language to the other"  
[X Link](https://x.com/anyuser/status/1728308098308485242)  2023-11-25T07:02Z 39.6K followers, 77.5K engagements


"As a backend engineer. Please learn: - GraphQL/ REST - DB - System Design - Algorithms - API design - CI/CD - DS - Docker Stop jumping from one language to the other"  
[X Link](https://x.com/anyuser/status/1756305252943556678)  2024-02-10T13:12Z 39.6K followers, 49.4K engagements


"As an experienced backend engineer. Please learn: - SOLID design principles - Multithreading - Immutability - Streaming messaging - Caching - Security - SSL JWT OAuth - factory decorator singleton obeservable design patterns - TDD All very important topics "  
[X Link](https://x.com/anyuser/status/1766522519778189790)  2024-03-09T17:52Z 39.6K followers, 75.6K engagements


"One of the most in demand profile - Java + Springboot + Kafka + Microservices + CICD real interview report. [--] mins interview round . The candidate has 4+ years of experience . Panel has [--] years of experience. SELECTED"  
[X Link](https://x.com/anyuser/status/1798608884397134270)  2024-06-06T06:52Z 39.6K followers, 72.5K engagements


"As a Java RESTful APIs developer you should be familiar with the following key topics for creating secure applications. Consider as a checklist for Java Security 👇 Add more if I have missed any . - OAuth [---] - JWT (JSON Web Tokens) - OpenID Connect - Role-Based Access Control (RBAC) - Spring Security integration - SSL/TLS implementation - HTTPS - Key management and rotation - SQL Injection prevention - Cross-Site Scripting (XSS) protection - Cross-Site Request Forgery (CSRF) protection - Use of frameworks like Hibernate Validator for input validation - API Gateway integration (e.g. Spring"  
[X Link](https://x.com/SumitM_X/status/1829931630338736208)  2024-08-31T17:17Z 39.6K followers, 51.4K engagements


"Your microservices architecture implements OAuth [---] for authentication but you're facing challenges propagating the OAuth token through internal service-to-service calls leading to unauthorized requests. How would you redesign the security architecture to propagate authentication tokens across internal services"  
[X Link](https://x.com/SumitM_X/status/1842545464358428982)  2024-10-05T12:40Z 39.6K followers, 122K engagements


"As a backend engineer. Please learn: - GraphQL/ REST - DB - Design - DS & Algorithms - API design - CI/CD - Docker Pick up a language. Stop jumping from one language to the other"  
[X Link](https://x.com/anyuser/status/1845387148087742520)  2024-10-13T08:52Z 39.6K followers, 110.6K engagements


"As a backend engineer. Please learn: - System Design (scalability microservices) -APIs (REST GraphQL gRPC) -Database Systems (SQL NoSQL) -Distributed Systems (consistency replication) -Caching (Redis Memcached) -Security (OAuth2 JWT encryption) -DevOps (CI/CD Docker Kubernetes) -Performance Optimization (profiling load balancing) -Cloud Services (AWS GCP Azure) -Monitoring (Prometheus Grafana) Pick up a language. Stop jumping from one language to the other"  
[X Link](https://x.com/SumitM_X/status/1847956807907430655)  2024-10-20T11:03Z 39.6K followers, 541.5K engagements


"As a frontend engineer. Please learn: - JavaScript/TypeScript - Responsive Design (CSS Flexbox Grid) - Performance Optimization (lazy loading code splitting tree shaking memoization) - Web Security (CORS XSS CSRFContent Security Policy Secure Cookies) - Testing (Jest Cypress Enzyme) - Build Tools (Webpack Vite Babel) - Version Control (Git) - Browser DevTools & Debugging - Accessibility (WCAG standards) - Progressive Web Apps (PWA) - Component Architecture (Atomic Design Higher-Order Components) - Micro Frontends - API Integration (REST GraphQL WebSockets) - Testing Strategies (Unit"  
[X Link](https://x.com/anyuser/status/1848662523072921719)  2024-10-22T09:47Z 39.6K followers, 116.4K engagements


"Want to be a backend architect Please learn : [--]. Microservices Design Service decomposition Bounded contexts Resilience (Circuit Breaker Bulkheads) [--]. Distributed Systems Fundamentals CAP Theorem Event sourcing CQRS Data consistency models (ACID vs. BASE) [--]. High-Performance Data Management Database partitioning Index optimization NoSQL data modeling [--]. Advanced API Design gRPC GraphQL API Gateways Asynchronous APIs [--]. Event-Driven Architecture Kafka Message queues Pub/Sub patterns Saga pattern [--]. Cloud-Native Patterns Container orchestration (Kubernetes) Serverless Multi-cloud strategies 7."  
[X Link](https://x.com/anyuser/status/1850208339507937604)  2024-10-26T16:10Z 39.6K followers, 142.2K engagements


"As a senior Java backend developer It will be good if you have an understanding of the below [--] topics👇 [--]. CAP Theorem [--]. Consistency Models [--]. Distributed System Architectures [--]. Socket Programming (TCP/IP and UDP) [--]. HTTP and RESTful APIs [--]. Remote Procedure Call (RPC) - gRPC Thrift RMI [--]. Message Queues (Kafka RabbitMQ JMS) [--]. Java Concurrency (ExecutorService Future ForkJoinPool) [--]. Thread Safety and Synchronization [--]. Java Memory Model [--]. Distributed Databases (Cassandra MongoDB HBase) [--]. Data Sharding and Partitioning [--]. Caching Mechanisms (Redis Memcached Ehcache) [--]. Zookeeper"  
[X Link](https://x.com/SumitM_X/status/1852588708110700561)  2024-11-02T05:49Z 39.6K followers, 91.1K engagements


"Someone generated this screenshot . Looks good 👍"  
[X Link](https://x.com/anyuser/status/1853288448045539399)  2024-11-04T04:09Z 39.6K followers, 90.1K engagements


"As a senior Java developer Don't just stay on core java please stay updated and learn : [--]. Cloud-native development including microservices serverless computing (AWS Lambda Azure Functions) and tools like Kubernetes Istio and Helm. [--]. Reactive programming using Project Reactor Spring WebFlux and RxJava for non-blocking event-driven applications. [--]. Event-driven architectures with Kafka RabbitMQ and CQRS/Event Sourcing for scalability. [--]. API Economy: API gateways like Kong and ensuring API security with OAuth2 and OpenID Connect. [--]. Edge computing with AWS Greengrass or Azure IoT Edge for"  
[X Link](https://x.com/anyuser/status/1857695689200853497)  2024-11-16T08:02Z 39.6K followers, 108.6K engagements


"As a Reactjs developer please learn 👇"  
[X Link](https://x.com/anyuser/status/1860766478674374754)  2024-11-24T19:24Z 39.6K followers, 97.3K engagements


"Someone generated this screenshot. Looks good 👍"  
[X Link](https://x.com/SumitM_X/status/1863184396133564416)  2024-12-01T11:32Z 39.6K followers, 88.8K engagements


"Want to become a backend architect Do this 👇"  
[X Link](https://x.com/anyuser/status/1869014847599604133)  2024-12-17T13:40Z 39.6K followers, 98.5K engagements


"As a Java developer in [----] just knowing core Java isn't enough. Be market-ready Please learn 👇 [--]. Event-Driven Architecture: Kafka RabbitMQ Pulsar. [--]. CAP Theorem: Understanding trade-offs between consistency availability and partition tolerance. [--]. Consensus Algorithms: Paxos Raft or Gossip Protocol. [--]. Distributed Tracing: OpenTelemetry Jaeger Zipkin. [--]. API Gateway: Tools like Zuul Kong or Apigee. [--]. Service Mesh: Istio Linkerd. [--]. Resilience Patterns: Circuit Breaker (Resilience4j Hystrix) Bulkhead. [--]. Data Management: Event Sourcing CQRS and distributed transactions"  
[X Link](https://x.com/SumitM_X/status/1876654223896838383)  2025-01-07T15:36Z 39.6K followers, 40.1K engagements


"Want to be a backend architect Please learn 👇"  
[X Link](https://x.com/anyuser/status/1885379904188866994)  2025-01-31T17:29Z 39.6K followers, 66.5K engagements


"Cognizant has just announced a 5-MONTH DELAY in salary hikes citing rising attrition rates. P.S. Cognizant's CEO is the highest-paid Indian CEO"  
[X Link](https://x.com/anyuser/status/1897490362140176711)  2025-03-06T03:32Z 39.6K followers, 372.1K engagements


"As a backend engineer. Please learn: - System Design (scalability microservices) -APIs (REST GraphQL gRPC) -Database Systems (SQL NoSQL) -Distributed Systems (consistency replication) -Caching (Redis Memcached) -Security (OAuth2 JWT encryption) -DevOps (CI/CD Docker Kubernetes) -Performance Optimization (profiling load balancing) -Cloud Services (AWS GCP Azure) -Monitoring (Prometheus Grafana) Pick up a language. Stop jumping from one language to the other"  
[X Link](https://x.com/SumitM_X/status/1897908755020628118)  2025-03-07T07:14Z 39.6K followers, 213.6K engagements


"Senior Backend Developers Do this 👇"  
[X Link](https://x.com/anyuser/status/1902772529787535645)  2025-03-20T17:21Z 39.6K followers, 119.1K engagements


"Two microservices A and B share the same database for some entities due to legacy design. Microservice A makes a change to the entity but Microservice B does not reflect the change immediately leading to inconsistent behavior. How would you refactor the system to solve the shared database issue without creating downtime"  
[X Link](https://x.com/anyuser/status/1907483847412875317)  2025-04-02T17:22Z 39.6K followers, 124.9K engagements


"As a backend developer living in [----] Plase learn 👇 [--]. Cloud-Native Development (AWS/GCP/Azure + Kubernetes) Backend is shifting heavily to scalable distributed cloud systems. Knowing Kubernetes Docker CI/CD and cloud SDKs is important. [--]. Event-Driven Architecture & Messaging Systems learn tools like Apache Kafka RabbitMQ and Redis Streams for decoupled real-time systems. [--]. API Design & Documentation (REST + GraphQL + OpenAPI) Clean versioned well-documented APIs are non-negotiable. Postman Swagger GraphQL skills . [--]. Performance Optimization & Observability Know how to profile trace and"  
[X Link](https://x.com/SumitM_X/status/1915464877113803090)  2025-04-24T17:56Z 39.6K followers, 74.7K engagements


"As a senior Java backend developer It will be good if you have an understanding of the below [--] topics👇 [--]. CAP Theorem [--]. Consistency Models [--]. Distributed System Architectures [--]. Socket Programming (TCP/IP and UDP) [--]. HTTP and RESTful APIs [--]. Remote Procedure Call (RPC) - gRPC Thrift RMI [--]. Message Queues (Kafka RabbitMQ JMS) [--]. Java Concurrency (ExecutorService Future ForkJoinPool) [--]. Thread Safety and Synchronization [--]. Java Memory Model [--]. Distributed Databases (Cassandra MongoDB HBase) [--]. Data Sharding and Partitioning [--]. Caching Mechanisms (Redis Memcached Ehcache) [--]. Zookeeper"  
[X Link](https://x.com/anyuser/status/1918918120288231457)  2025-05-04T06:38Z 39.6K followers, 66.6K engagements


"Minimum salaries as per experience in software development in India in [----] that you should aim for 👇 [--] years experience - [--] LPA [--] years experience - [--] LPA [--] years experience - [--] LPA [--] years experience - [--] LPA [--] years experience - [--] LPA [--] years experience - [--] LPA I think these are the minimum numbers that you should be looking at. If you are earning below this you need to fix it"  
[X Link](https://x.com/anyuser/status/1931359559156944992)  2025-06-07T14:36Z 39.6K followers, 88.2K engagements


"As a backend developer living in [----] Plase learn 👇 [--]. Cloud-Native Development (AWS/GCP/Azure + Kubernetes) Backend is shifting heavily to scalable distributed cloud systems. Knowing Kubernetes Docker CI/CD and cloud SDKs is important. [--]. Event-Driven Architecture & Messaging Systems learn tools like Apache Kafka RabbitMQ and Redis Streams for decoupled real-time systems. [--]. API Design & Documentation (REST + GraphQL + OpenAPI) Clean versioned well-documented APIs are non-negotiable. Postman Swagger GraphQL skills . [--]. Performance Optimization & Observability Know how to profile trace and"  
[X Link](https://x.com/SumitM_X/status/1933473520455164329)  2025-06-13T10:36Z 39.6K followers, 83.4K engagements


"As a senior Java backend developer please learn these [--] topics "  
[X Link](https://x.com/SumitM_X/status/1955206298343235723)  2025-08-12T09:54Z 39.6K followers, 94.1K engagements


"As a backend architect these are [--] things that you should learn"  
[X Link](https://x.com/SumitM_X/status/1963843812721062244)  2025-09-05T05:57Z 39.6K followers, 136.2K engagements


"As an API developer do you know what is Pagination When an API returns a large dataset (say thousands of users) sending everything in one response is inefficient. Thats where pagination comes in - the API sends results in chunks (pages). Common API Pagination Styles [--]. Offset-based GET /userspage=3&limit=20 Response: "page": [--] "limit": [--] "totalPages": [--] "data": .  Pros: Easy to implement supports jumping to any page. Cons: Slower with huge offsets. [--]. Cursor-based (a.k.a. Keyset) GET /usersafter=125&limit=20 Response: "nextCursor": [---] "data": .  Pros: Efficient for large datasets (infinite"  
[X Link](https://x.com/SumitM_X/status/1967087015142584412)  2025-09-14T04:44Z 39.6K followers, 56.2K engagements


"Backend Interview question that is being asked a lot these days : You are implementing an API that returns users to the client but the database has [--] M(1000000) users How will you return data to the client efficiently"  
[X Link](https://x.com/SumitM_X/status/1967169006206648593)  2025-09-14T10:10Z 39.6K followers, 142.1K engagements


"As a backend dev in [----] learn these [--] skills to keep you relevant in this Job market : [--]. API Design - REST/GraphQL/gRPC [--]. Authentication & Authorization - OAuth2 JWT OpenID Connect Passkeys [--]. Databases - SQL NoSQL sharding indexing query tuning [--]. Caching - Redis CDN edge caching strategies [--]. Event-Driven Systems - Kafka Pulsar streaming pipelines [--]. Concurrency & Async - reactive programming structured concurrency [--]. Distributed Systems - microservices service mesh eventual consistency [--]. Security - HTTPS encryption zero trust OWASP top [--] [--]. Observability - logging tracing metrics"  
[X Link](https://x.com/SumitM_X/status/1967227552923316265)  2025-09-14T14:02Z 39.6K followers, 159.4K engagements


"API concepts that are discussed in interviews don't skip these if you are a backend dev : [--]. Idempotency: Know why PUT/DELETE are idempotent but POST isnt. Helps avoid accidental double writes. [--]. Pagination: Offset works until scale hits. Cursor/keyset is what you need for big data sets. [--]. Versioning: URI vs Header vs Query param. Theres no one right way just tradeoffs. [--]. Rate limiting: Token bucket naive fixed window if you care about fairness. [--]. Error contracts: [---] (bad request) [---] (validation issue) [---] (conflict). Dont just throw [---] everywhere. [--]. Caching: ETag + Cache-Control save"  
[X Link](https://x.com/SumitM_X/status/1968537805321318911)  2025-09-18T04:49Z 39.6K followers, 64.7K engagements


"As a senior Java backend developer It will be good if you have an understanding of the below [--] topics👇 [--]. CAP Theorem [--]. Consistency Models [--]. Distributed System Architectures [--]. Socket Programming (TCP/IP and UDP) [--]. HTTP and RESTful APIs [--]. Remote Procedure Call (RPC) - gRPC Thrift RMI [--]. Message Queues (Kafka RabbitMQ JMS) [--]. Java Concurrency (ExecutorService Future ForkJoinPool) [--]. Thread Safety and Synchronization [--]. Java Memory Model [--]. Distributed Databases (Cassandra MongoDB HBase) [--]. Data Sharding and Partitioning [--]. Caching Mechanisms (Redis Memcached Ehcache) [--]. Zookeeper"  
[X Link](https://x.com/anyuser/status/1973023192576065824)  2025-09-30T13:52Z 39.6K followers, 42.5K engagements


"10 Terms Every Developer Should Know in [----] : [--]. LLM (Large Language Models) [--]. RAG (Retrieval Augmented Generation) [--]. Edge Computing [--]. Zero Trust [--]. Idempotency [--]. Event-Driven Architecture [--]. Serverless [--]. Observability [--]. Feature Flags [--]. Data Mesh"  
[X Link](https://x.com/SumitM_X/status/1973373696845992229)  2025-10-01T13:05Z 39.6K followers, 37.4K engagements


"I often get asked - "How much database knowledge is enough for a backend developer" If you're a backend developer looking to learn databases. Learn these [--] topics👇 [--]. Basic Queries: SELECT INSERT UPDATE DELETE [--]. Joins: INNER JOIN LEFT JOIN RIGHT JOIN FULL JOIN [--]. Indexes: Types performance impact [--]. Normalization & Denormalization: When to use them [--]. Transactions: ACID properties COMMIT ROLLBACK [--]. Stored Procedures & Triggers [--]. Query Optimization: EXPLAIN ANALYZE indexing strategies [--]. Sharding & Replication: Scaling databases [--]. Partitioning: Horizontal vs. Vertical [--]. Locks &"  
[X Link](https://x.com/anyuser/status/1974517107477119477)  2025-10-04T16:48Z 39.6K followers, 65K engagements


"Was asked in JP Morgan Interview"  
[X Link](https://x.com/SumitM_X/status/1974893658978803989)  2025-10-05T17:45Z 39.6K followers, 159.5K engagements


"As a Reactjs developer Please learn : [--]. Advanced State Management - Redux & Redux Toolkit - Context API - Recoil or Zustand [--]. React Performance Optimization - Memoization (React.memo useMemo useCallback) - Code Splitting - React Profiler [--]. Component Design Patterns - Higher-Order Components (HOCs) - Render Props - Custom Hooks [--]. Server-Side Rendering (SSR) - Next.js - Hydration [--]. TypeScript with React - Type Safety - Advanced Types and Generics [--]. Testing - React Testing Library - End-to-End Testing (Cypress Playwright) - Mocking and Stubbing [--]. React Ecosystem and Tooling - Webpack and"  
[X Link](https://x.com/SumitM_X/status/1975961856507613564)  2025-10-08T16:29Z 39.6K followers, 145.1K engagements


"As a developer in [----] how many of these AI related concepts do you understand - LLM vs SLM - Tokens vs Context Window - Prompt Engineering vs Prompt Chaining - RAG (Retrieval Augmented Generation) - Embeddings - Vector Databases - Agents vs Workflows"  
[X Link](https://x.com/SumitM_X/status/2007147404383138287)  2026-01-02T17:50Z 39.6K followers, 18.9K engagements


"As a developer in [----] how many of these [--] terms do you understand : [--]. Token [--]. Context Window [--]. Prompt [--]. Embedding [--]. Temperature [--]. Top-P (Nucleus Sampling) [--]. Hallucination [--]. LLM (Large Language Model) [--]. RAG (Retrieval Augmented Generation) [--]. Inference"  
[X Link](https://x.com/SumitM_X/status/2010700676054310966)  2026-01-12T13:09Z 39.6K followers, 53.1K engagements


"As a developer have you asked yourself how Netflix resumes exactly where you stopped Is it just local storage or synced state across devices"  
[X Link](https://x.com/SumitM_X/status/2013232176716779822)  2026-01-19T12:48Z 39.6K followers, 1.6M engagements


"As a backend engineer. Please learn: - SOLID design principles - Multithreading - Immutability - Streaming messaging - Caching - Security - SSL JWT OAuth - factory decorator singleton obeservable design patterns - TDD All very important topics "  
[X Link](https://x.com/SumitM_X/status/2015279807299551743)  2026-01-25T04:25Z 39.6K followers, 293.6K engagements


"4 questions that interviewers ask about Springboot performance : - How can you optimize the startup time of app -What is role of Actuator in monitoring startup time - Explain how classpath scanning mechanism affects startup time - What are some tools/techniques to analyze startup time https://twitter.com/i/web/status/2018637797020827863 https://twitter.com/i/web/status/2018637797020827863"  
[X Link](https://x.com/SumitM_X/status/2018637797020827863)  2026-02-03T10:48Z 39.5K followers, [----] engagements


"In [----] ( in India) If you have 4+ years of experience in software development I have categorized potential salary ranges based on experience (X = number of years of experience). Categories and their respective salary (fixed CTC): A++ Category: 15X LPA+ A+ Category: 8X LPA+ A Category: 6X LPA+ B+ Category: 4.5X LPA+ B Category: 3X LPA+ C+ Category: 2.5X LPA+ C Category: 2X LPA+ C- Category: 1.5X LPA+ D Category: 1.2X LPA+ E Category: 1X LPA+ F Category: 1X LPA - Which category do you fall into If you are currently in a category below B+ you should aim for at least the B+ category."  
[X Link](https://x.com/SumitM_X/status/2019447072429400091)  2026-02-05T16:24Z 39.5K followers, 25.4K engagements


"MUST KNOW Design Patterns in Microservices: - API Gateway - Service Registry - Circuit Breaker - Event-Driven - Database per Service - Command Query Responsibility Segregation (CQRS) - Externalized Configuration - Saga Pattern - Bulkhead Pattern - Backends for Frontends (BFF)"  
[X Link](https://x.com/SumitM_X/status/2020052377068503076)  2026-02-07T08:29Z 39.6K followers, 27.6K engagements


"Before going for the LLD round don't forget to prepare how to : Design a Parking Lot Design an elevator system Design API rate limiter Design a logging system Design a hotel management system Design a movie ticket booking system"  
[X Link](https://x.com/SumitM_X/status/2020103439854776575)  2026-02-07T11:52Z 39.5K followers, 22.2K engagements


"Which Query has better performance SELECT DISTINCT dept FROM emp; vs SELECT dept FROM emp GROUP BY dept;"  
[X Link](https://x.com/SumitM_X/status/2020135653409706402)  2026-02-07T14:00Z 39.6K followers, 40.7K engagements


"Which SQL Query has better performance SELECT * FROM emp WHERE dept = 'IT' OR dept = 'HR'; vs SELECT * FROM emp WHERE dept = 'IT' UNION ALL SELECT * FROM emp WHERE dept = 'HR';"  
[X Link](https://x.com/SumitM_X/status/2020136999403815394)  2026-02-07T14:06Z 39.5K followers, 50.3K engagements


"How is Redis so fast with single thread"  
[X Link](https://x.com/SumitM_X/status/2020544744179605794)  2026-02-08T17:06Z 39.5K followers, 75.8K engagements


"One of the most asked System Design Interview Question: Design a Rate Limiter for a high-traffic API service (think Twitter/Netflix scale). Requirements: [--]. Limit requests per user (e.g. [---] requests/min). [--]. Limit requests globally (e.g. 1M requests/sec across all users). [--]. Should work in a distributed environment (multiple servers). [--]. Must ensure fairness (no single user should starve others). [--]. Handle burst traffic gracefully. What Interviewers look for: Which algorithm would you choose (Token Bucket Leaky Bucket Fixed Window Sliding Window) and why. How will you store counters"  
[X Link](https://x.com/SumitM_X/status/2020555535196852655)  2026-02-08T17:49Z 39.6K followers, 33.4K engagements


"One Redis key (product:123) is accessed 1M times/sec. Redis CPU hits 100%. What's your next step"  
[X Link](https://x.com/SumitM_X/status/2020763480727634062)  2026-02-09T07:35Z 39.5K followers, 96.4K engagements


"You see this request coming from frontend : GET /api/employeespage=1&pageSize=0 What will you return"  
[X Link](https://x.com/SumitM_X/status/2020865004136714402)  2026-02-09T14:18Z 39.6K followers, 36.8K engagements


"Each microservice owns its database. Now the business asks for a real-time dashboard requiring joins across multiple services. Your non technical manager asks you to do it in [--] sprint without breaking service isolation What's your plan"  
[X Link](https://x.com/SumitM_X/status/2020893510321500579)  2026-02-09T16:12Z 39.6K followers, 51.9K engagements


"Tell me your worst Interview experience One of my worst interview experiences was when I was working at my first company Infosys in Chandigarh on a legacy product using C. I built my own Java projects and went for Java interviews. For one interview at Siemens Noida I travelled [---] hours by train and [--] hour by bus to reach the office. And I got rejected in just [--] minutes. There were two panelists who asked me two multithreading questions that I could not answer and I was asked to leave. Total travel time - 11-12 hours Interview time - less than [--] mins"  
[X Link](https://x.com/SumitM_X/status/2021065108571472019)  2026-02-10T03:34Z 39.5K followers, 47.9K engagements


"The DB query that was supposed to update only [--] row is still running after [--] seconds in Production. What's your next step"  
[X Link](https://x.com/SumitM_X/status/2021588084563853405)  2026-02-11T14:12Z 39.5K followers, 33.8K engagements


"Same salary same location . What job are you picking [--]. SDE [--] at Altassian [--]. SDE [--] at Uber [--]. EM at VMware [--]. VP at Goldman Sachs"  
[X Link](https://x.com/SumitM_X/status/2021782280008855871)  2026-02-12T03:03Z 39.5K followers, 157.6K engagements


"POST /users should return [---] or [---] after creating user"  
[X Link](https://x.com/SumitM_X/status/2021904744013606975)  2026-02-12T11:10Z 39.5K followers, 30.9K engagements


"What happens if Database's auto-increment ID runs out"  
[X Link](https://x.com/SumitM_X/status/2021924513680961787)  2026-02-12T12:29Z 39.5K followers, 60.8K engagements


"Common React Interview Question: What is the problem in this code function App() const items setItems = React.useState("A" "B"); const addItem = () = items.push("C"); setItems(items); ; return ( button onClick=addItemAdd/button = ( divitem/div )) / ); http://items.map http://items.map"  
[X Link](https://x.com/SumitM_X/status/2021953121216606541)  2026-02-12T14:22Z 39.6K followers, 22.3K engagements


"What will be the output you Java experts :"  
[X Link](https://x.com/SumitM_X/status/2021955551790518491)  2026-02-12T14:32Z 39.5K followers, 25.4K engagements


"Can DB Views be indexed"  
[X Link](https://x.com/SumitM_X/status/2022256379462119769)  2026-02-13T10:27Z 39.5K followers, 29.4K engagements


"What is the difference between git reset HEAD1 vs git revert HEAD"  
[X Link](https://x.com/SumitM_X/status/2022345936840888513)  2026-02-13T16:23Z 39.5K followers, 37.6K engagements


"What do u prefer Silent Token Refresh: Refresh token silently in background. Graceful Logout: display a user-friendly msg indicating that their session has expired & redirect them to login page. Session Expiry Warning: warn user few mins before session is about to expire"  
[X Link](https://x.com/SumitM_X/status/2022656825104175330)  2026-02-14T12:59Z 39.6K followers, [----] engagements


"Was asked in JP Morgan Interview :"  
[X Link](https://x.com/SumitM_X/status/2022720438233895382)  2026-02-14T17:11Z 39.6K followers, 53.2K engagements


"Your app is slow . Do you reduce latency or increase throughput"  
[X Link](https://x.com/SumitM_X/status/2022872603912999230)  2026-02-15T03:16Z 39.6K followers, 15.8K engagements


"Tech Lead tells you in API request : PUT /users/id If user does not exist create it. What's your reply"  
[X Link](https://x.com/SumitM_X/status/2022971833285505404)  2026-02-15T09:50Z 39.6K followers, 120.6K engagements


"What will this SQL Query print SELECT emp_name FROM employees WHERE salary ( SELECT AVG(salary) FROM employees GROUP BY department_id );"  
[X Link](https://x.com/SumitM_X/status/2023054877799358782)  2026-02-15T15:20Z 39.6K followers, 52.1K engagements


"As a backend engineer. Please learn: - SOLID design principles - Singleton pattern - Observables - Multithreading - Immutability - Serializable - Security - factory design pattern All very important topics "  
[X Link](https://x.com/SumitM_X/status/1746609895137284292)  2024-01-14T19:07Z 39.6K followers, 50.8K engagements


"Someone created this screenshot. Lokks good 👍"  
[X Link](https://x.com/SumitM_X/status/1852732754854588575)  2024-11-02T15:21Z 39.6K followers, 158.2K engagements


"As a senior backend developer Please learn these important design patterns(at least [--] from every section)👇 [--]. Creational Patterns _______________________ -Singleton: Ensures a single global instance. -Factory Method: Creates objects without specifying classes. -Builder: Constructs complex objects step-by-step. [--]. Structural Patterns _______________________ -Adapter: Connects incompatible interfaces. -Decorator: Dynamically adds functionalities. -Facade: Simplifies complex subsystems. [--]. Behavioral Patterns _______________________ -Observer: Notifies dependents of state changes. -Strategy:"  
[X Link](https://x.com/SumitM_X/status/1855200047228400063)  2024-11-09T10:45Z 39.6K followers, 36.2K engagements


"As a Microservices developer Please learn : [--]. Microservices Architecture Basics: Monolithic vs. Microservices characteristics (independence scalability resilience) and designing microservices boundaries (DDD - Domain-Driven Design). [--]. Service Communication: Synchronous (REST gRPC) vs. Asynchronous (Message Queues) API design and versioning event-driven architecture and event sourcing. [--]. Data Management: Database per service distributed data management (saga pattern 2PC CQRS) and handling data consistency across services. [--]. Deployment Strategies: Containerization (Docker) orchestration"  
[X Link](https://x.com/SumitM_X/status/1858213700202815691)  2024-11-17T18:20Z 39.6K followers, 56.4K engagements


"Senior Java developers do this 👇"  
[X Link](https://x.com/SumitM_X/status/1868585439952855448)  2024-12-16T09:14Z 39.6K followers, 114.5K engagements


"As a frontend engineer. Please learn: - JavaScript/TypeScript - Responsive Design (CSS Flexbox Grid) - Performance Optimization (lazy loading code splitting tree shaking memoization) - Web Security (CORS XSS CSRFContent Security Policy Secure Cookies) - Testing (Jest Cypress Enzyme) - Build Tools (Webpack Vite Babel) - Version Control (Git) - Browser DevTools & Debugging - Accessibility (WCAG standards) - Progressive Web Apps (PWA) - Component Architecture (Atomic Design Higher-Order Components) - Micro Frontends - API Integration (REST GraphQL WebSockets) - Testing Strategies (Unit"  
[X Link](https://x.com/SumitM_X/status/1871100817903849974)  2024-12-23T07:49Z 39.6K followers, 44.3K engagements


"As a backend engineer. Please learn: - DB - System Design - Algorithms - API design - API Security - CI/CD - DS - Docker/ Kubernetes - Caching - Messaging Stop jumping from one language to the other"  
[X Link](https://x.com/SumitM_X/status/1884294735524999457)  2025-01-28T17:37Z 39.6K followers, 112.1K engagements


"So glad - it's helping 👍"  
[X Link](https://x.com/SumitM_X/status/1891417602494218324)  2025-02-17T09:21Z 39.6K followers, 157.3K engagements


"As a backend engineer. Please learn: - System Design (scalability microservices) -APIs (REST GraphQL gRPC) -Database Systems (SQL NoSQL) -Distributed Systems (consistency replication) -Caching (Redis Memcached) -Security (OAuth2 JWT encryption) -DevOps (CI/CD Docker Kubernetes) -Performance Optimization (profiling load balancing) -Cloud Services (AWS GCP Azure) -Monitoring (Prometheus Grafana) Pick up a language. Stop jumping from one language to the other"  
[X Link](https://x.com/SumitM_X/status/1908844684551901501)  2025-04-06T11:30Z 39.6K followers, 149.1K engagements


"Massive jam .massive jams today in Bangalore. Not able to even get out of the Tech park from last [--] hour"  
[X Link](https://x.com/SumitM_X/status/1978420488805208334)  2025-10-15T11:19Z 39.6K followers, 52.4K engagements


"MUST KNOW Design Patterns in Microservices: - API Gateway - Service Registry - Circuit Breaker - Event-Driven - Database per Service - Command Query Responsibility Segregation (CQRS) - Externalized Configuration - Saga Pattern - Bulkhead Pattern - Backends for Frontends (BFF)"  
[X Link](https://x.com/SumitM_X/status/1978485208589685112)  2025-10-15T15:36Z 39.6K followers, 48.2K engagements


"As a backend engineer. Please learn: - DB - System Design - Algorithms - API design - API Security - CI/CD - DS - Docker/ Kubernetes - Caching - Messaging Stop jumping from one language to the other"  
[X Link](https://x.com/SumitM_X/status/1979789821750198588)  2025-10-19T06:00Z 39.6K followers, 209K engagements


"Senior backend devs do this :"  
[X Link](https://x.com/SumitM_X/status/1986764143802859818)  2025-11-07T11:54Z 39.6K followers, 88.7K engagements


"As a Backend dev how many concepts can you explain from below : [--]. Event-Driven Architecture [--]. Saga Pattern [--]. CQRS (Command Query Responsibility Segregation) [--]. Event Sourcing [--]. Circuit Breaker Pattern [--]. Distributed Tracing [--]. CAP Theorem [--]. Idempotency [--]. Data Sharding [--]. API Gateway"  
[X Link](https://x.com/SumitM_X/status/1987092799477719504)  2025-11-08T09:40Z 39.6K followers, 111.8K engagements


"Preparing for a Backend Engineer role Just DSA isn't enough Here are [--] topics that you must learn : [--]. Concurrency & Parallelism Threads vs async race conditions locks deadlocks queues [--]. System Design : Design scalable systems (e.g. Dropbox URL shortener) talk trade-offs: CAP consistency availability latency. [--]. Databases & Caching : Normalize vs denormalize secondary indexes Redis vs Memcached cache invalidation eventual consistency. [--]. Distributed Systems Fundamentals : Leader election replication partition tolerance distributed locking failure recovery. [--]. Reliability Patterns: Retries"  
[X Link](https://x.com/SumitM_X/status/1988311759338566004)  2025-11-11T18:23Z 39.6K followers, 67.2K engagements


"Backend Interview question that is being asked a lot these days : You are implementing an API that returns users to the client but the database has [--] M(1000000) users How will you return data to the client efficiently"  
[X Link](https://x.com/SumitM_X/status/1989699484029247779)  2025-11-15T14:18Z 39.6K followers, 521.2K engagements


"What is salting and why do we salt passwords"  
[X Link](https://x.com/SumitM_X/status/1996095364592816248)  2025-12-03T05:53Z 39.6K followers, 1.9M engagements


"As a backend engineer. Please learn: - SOLID design principles - Multithreading - Immutability - Streaming messaging - Caching - Security - SSL JWT OAuth - factory decorator singleton obeservable design patterns - TDD All very important topics "  
[X Link](https://x.com/SumitM_X/status/2007779810375094777)  2026-01-04T11:43Z 39.6K followers, 356.3K engagements


"As a Developer have you asked yourself how "Typing" shows up instantly in WhatsApp Is the app refreshing every second Or is there something else happening behind the scenes"  
[X Link](https://x.com/SumitM_X/status/2012470091095609692)  2026-01-17T10:20Z 39.6K followers, 4.1M engagements


"As a Frontend Engineer in [----] please learn: - JavaScript & TypeScript (deeply not just syntax) - Responsive Design (CSS Flexbox Grid Container Queries) - Performance Optimization (lazy loading code splitting tree shaking memoization Core Web Vitals) - Web Security (CORS XSS CSRF Content Security Policy secure cookies) - Testing (Jest Cypress Playwright) - Build Tools (Vite Webpack basics Babel bundling strategies) - Version Control (Git PR workflows rebasing) - Browser DevTools & Debugging - Accessibility (WCAG ARIA keyboard navigation screen readers) - Progressive Web Apps (PWA) - Component"  
[X Link](https://x.com/SumitM_X/status/2014035956643537258)  2026-01-21T18:02Z 39.6K followers, 141K engagements


"As a backend dev in [----] learn these [--] skills to keep you relevant in this Job market : [--]. API Design - REST/gRPC [--]. Authentication & Authorization - OAuth2 JWT OpenID Connect Passkeys [--]. Databases - SQL NoSQL sharding indexing query tuning [--]. Caching - Redis CDN edge caching strategies [--]. Event-Driven Systems - Kafka Pulsar streaming pipelines [--]. Concurrency & Async - reactive programming structured concurrency [--]. Distributed Systems - microservices service mesh eventual consistency [--]. Security - HTTPS encryption zero trust OWASP top [--] [--]. Observability - logging tracing metrics"  
[X Link](https://x.com/SumitM_X/status/2017965052494799110)  2026-02-01T14:15Z 39.6K followers, 38.7K engagements


"Java devs how many of these skills are on your CV [--]. Distributed Caching : Redis Memcache [--]. Monitoring : Splunk Dynatrace Grafana ELK [--]. Messaging : Kafka JMS RabbitMQ [--]. Testing : TDD Mockito JUnit [--]. CI/CD & Containers : Jenkins GitHub Actions Docker Kubernetes [--]. Frameworks : Spring Boot Spring MVC Apache Camel [--]. Microservices : Config Server API Gateway Service Discovery Resilience4j [--]. Multithreading & Concurrency : Executors ForkJoin CompletableFuture [--]. Security : Spring Security OAuth2 JWT [--]. Persistence : Hibernate JPA MyBatis [--]. API Development : REST Swagger OpenAPI 12."  
[X Link](https://x.com/SumitM_X/status/2018303459238494454)  2026-02-02T12:40Z 39.6K followers, 29.7K engagements


"There are [--] types of software engineers: - Those who start with Service based MNCs like TCS TechM CTS Accenture and Wipro. - Those who start with Product based MNCs. - Those who start with captives - Those who start with start-up Which one are you"  
[X Link](https://x.com/SumitM_X/status/2018662816186790308)  2026-02-03T12:28Z 39.6K followers, [----] engagements


"As a Java backend dev you are expected to configure Alerts & Monitoring Tools like Splunk Dynatrace Grafana ELK. So in springboot interviews it is commonly asked- How can you integrate Spring Boot Actuator with external monitoring and alerting systems such as Grafana"  
[X Link](https://x.com/SumitM_X/status/2018896747251319064)  2026-02-04T03:57Z 39.6K followers, 44K engagements


"As a Backend dev how many concepts can you explain from below : [--]. Event-Driven Architecture [--]. Saga Pattern [--]. CQRS (Command Query Responsibility Segregation) [--]. Event Sourcing [--]. Circuit Breaker Pattern [--]. Distributed Tracing [--]. CAP Theorem [--]. Idempotency [--]. Data Sharding [--]. API Gateway https://twitter.com/i/web/status/2020071035669020719 https://twitter.com/i/web/status/2020071035669020719"  
[X Link](https://x.com/SumitM_X/status/2020071035669020719)  2026-02-07T09:44Z 39.6K followers, 68.1K engagements


"What if the Load Balancer itself goes down"  
[X Link](https://x.com/SumitM_X/status/2020341732836307428)  2026-02-08T03:39Z 39.6K followers, 109.4K engagements


"API request looks like below: GET /api/v1/customerspage=2&size=5 What will be the equivalent database query"  
[X Link](https://x.com/SumitM_X/status/2020445350352347634)  2026-02-08T10:31Z 39.6K followers, 48.6K engagements


"As a frontend dev You see [--] -100MB JSON responses from backend API. What's your next step"  
[X Link](https://x.com/SumitM_X/status/2020561300338905463)  2026-02-08T18:12Z 39.6K followers, 95.2K engagements


"Gone are the days when Java interviews were about HashMap vs Hashtable OOP pillars String vs StringBuilder or What is JVM The golden period of [----] is gone. Todays Java interviews focus on: Real microservices design (timeouts retries circuit breakers idempotency) Distributed system thinking (consistency partial failures message reprocessing) Spring Boot internals (auto-config AOP proxies startup bottlenecks) Database & caching strategy (query tuning indexes connection pool issues cache stampedes eviction strategy) Messaging systems (Kafka partitions consumer lag backpressure exactly-once"  
[X Link](https://x.com/SumitM_X/status/2020713443188416747)  2026-02-09T04:16Z 39.6K followers, 67.7K engagements


"Noticing something interesting lately . DSA rounds are reducing. My estimate: 4050% down in the next [--] months. The interview landscape is changing"  
[X Link](https://x.com/SumitM_X/status/2020914399108596003)  2026-02-09T17:35Z 39.6K followers, 50.5K engagements


"The beginning of the end of Leetcode grinding era"  
[X Link](https://x.com/SumitM_X/status/2020919955764675078)  2026-02-09T17:57Z 39.6K followers, 109K engagements


"The Tech Lead tells you in API request: GET /users/id If user is inactive return [---]. What's your reply"  
[X Link](https://x.com/SumitM_X/status/2021541623520547198)  2026-02-11T11:07Z 39.6K followers, 59.7K engagements


"I have launched four digital products via Topmate and Gumroad so far . Given the constant inquiries through DMs for purchase links I have decided to consolidate all relevant links in one place for your convenience. Individual Products: Cracking The Java Interview With Sumit: Topmate: Gumroad: HARD COPY: Cracking the MERN Interviews: Topmate: Gumroad: Cracking The Reactjs Interviews: Topmate: Gumroad: Cracking The React Native Interviews: Topmate: Gumroad: Bundle Offers: All in One Bundle (Java + Reactjs + MERN + React Native): Topmate: (Java book pdf + Java Interviews in [----] webinar"  
[X Link](https://x.com/SumitM_X/status/2021576013239681517)  2026-02-11T13:24Z 39.6K followers, [----] engagements


"SQL interview question: You have a table named Students with columns StudentID FirstName LastName and Score. Write an SQL query to find the names of students who have the same scores"  
[X Link](https://x.com/SumitM_X/status/2021985023172522390)  2026-02-12T16:29Z 39.6K followers, 168.2K engagements


"Some common Database Interview questions asked to Junior Java developers - [--]. Stored proc vs. functions vs. triggers [--]. Types of indexes in database - Clustered vs. non clustered [--]. Types of join in SQL [--]. Nth highest salary query [--]. What are materialized Views"  
[X Link](https://x.com/SumitM_X/status/2022141278293729780)  2026-02-13T02:50Z 39.6K followers, [----] engagements


"As a developer Do you know the difference between Dependency Inversion Inversion of Control and Dependency Injection"  
[X Link](https://x.com/SumitM_X/status/2022151091883069613)  2026-02-13T03:29Z 39.6K followers, 67.3K engagements


"Was asked in JP MORGAN Interview :"  
[X Link](https://x.com/SumitM_X/status/2022175717921108093)  2026-02-13T05:07Z 39.6K followers, 82.1K engagements


"Your microservice needs to transfer large amounts of data (e.g. files images) between services. How do you design the communication to avoid performance bottlenecks and manage large payloads efficiently"  
[X Link](https://x.com/SumitM_X/status/2022286368928567534)  2026-02-13T12:26Z 39.6K followers, 36.4K engagements


"Going for a Reactjs Interview Be ready to discuss performance. [--] points that you must discuss when it comes to performance based questions: [--]. Prevent Unnecessary Re-renders: Use React.memo useMemo and useCallback appropriately [--]. Optimize Component Structure: Break large components into smaller focused ones to reduce render cost [--]. Lazy-Load Components: Use React.lazy and Suspense for code splitting [--]. Use Concurrent Features: Leverage React 18s concurrent rendering and startTransition for non-urgent updates [--]. Avoid Inline Functions in JSX: Prevent re-creation of functions on every render"  
[X Link](https://x.com/SumitM_X/status/2022320805804437854)  2026-02-13T14:43Z 39.6K followers, 22.4K engagements


"Why volatile is not enough for atomicity"  
[X Link](https://x.com/SumitM_X/status/2022476832088670500)  2026-02-14T01:03Z 39.6K followers, [----] engagements


"I think in [--] year. DSA round could be just a code review round. Probably reviewing [--] AI generated solutions. Makes no sense writing whole code when 95% of code would be AI generated by next year"  
[X Link](https://x.com/SumitM_X/status/2022507819757690992)  2026-02-14T03:06Z 39.6K followers, 11.2K engagements


"What is git bisect start"  
[X Link](https://x.com/SumitM_X/status/2022583822622335430)  2026-02-14T08:08Z 39.6K followers, [----] engagements


"As a backend engineer. Please learn: - System Design (scalability microservices) -APIs (REST GraphQL gRPC) -Database Systems (SQL NoSQL) -Distributed Systems (consistency replication) -Caching (Redis Memcached) -Security (OAuth2 JWT encryption) -DevOps (CI/CD Docker Kubernetes) -Performance Optimization (profiling load balancing) -Cloud Services (AWS GCP Azure) -Monitoring (Prometheus Grafana) Pick up a language. Stop jumping from one language to the other https://twitter.com/i/web/status/2022630852165804115 https://twitter.com/i/web/status/2022630852165804115"  
[X Link](https://x.com/SumitM_X/status/2022630852165804115)  2026-02-14T11:15Z 39.6K followers, 268K engagements


"You have two tables: users and orders. You need to fetch all users who have placed at least one order. Which one would you use: INNER JOIN LEFT JOIN EXISTS"  
[X Link](https://x.com/SumitM_X/status/2022660384919060497)  2026-02-14T13:13Z 39.6K followers, 52K engagements


"Can you crack this"  
[X Link](https://x.com/SumitM_X/status/2022864349858308563)  2026-02-15T02:43Z 39.6K followers, [----] engagements


"20 years in IT . then I think you should have retirement money"  
[X Link](https://x.com/SumitM_X/status/2022888871407792252)  2026-02-15T04:21Z 39.6K followers, 54.6K engagements


"Tech Lead tells you in API request : PATCH /users/id Roles should come from frontend in request body. We just need to update it. What's your reply"  
[X Link](https://x.com/SumitM_X/status/2023009090147135805)  2026-02-15T12:18Z 39.6K followers, 15.6K engagements


"As a backend engineer. Please learn: - DB - System Design - Algorithms - API design - API Security - CI/CD - DS - Docker/ Kubernetes - Caching - Messaging Stop jumping from one language to the other"  
[X Link](https://x.com/SumitM_X/status/2023036541724168219)  2026-02-15T14:07Z 39.6K followers, 89.7K engagements


"What will be the output and why ListString a = new ArrayList(); ListInteger b = new ArrayList(); System.out.println(a.getClass() == b.getClass()); //"  
[X Link](https://x.com/SumitM_X/status/2023253637800280337)  2026-02-16T04:30Z 39.6K followers, 16.3K engagements


"As a Backend dev how many concepts can you explain from below : [--]. Event-Driven Architecture [--]. Saga Pattern [--]. CQRS (Command Query Responsibility Segregation) [--]. Event Sourcing [--]. Circuit Breaker Pattern [--]. Distributed Tracing [--]. CAP Theorem [--]. Idempotency [--]. Data Sharding [--]. API Gateway https://twitter.com/i/web/status/2023258980253139104 https://twitter.com/i/web/status/2023258980253139104"  
[X Link](https://x.com/SumitM_X/status/2023258980253139104)  2026-02-16T04:51Z 39.6K followers, 54.1K engagements


"As a Java developer Please learn: [--]. Core Java Mastery - OOP principles (SOLID DRY KISS) - Generics Lambda expressions Functional interfaces - Java Streams API (map/reduce collectors) - Java Collections framework - Java Reflection API - Exception handling [--]. Multithreading & Concurrency - Thread synchronization Executors Locks - Fork/Join framework - Understanding of race conditions deadlocks and thread pools - Concurrency utilities (java.util.concurrent) [--]. Design Patterns & Architecture - Common design patterns (Singleton Factory Builder) - Architectural patterns (MVC - Microservices"  
[X Link](https://x.com/SumitM_X/status/2023267030367887532)  2026-02-16T05:23Z 39.6K followers, 16.4K engagements


"User changes password. Login with old password still works for a while. Why"  
[X Link](https://x.com/SumitM_X/status/2023405097280319926)  2026-02-16T14:32Z 39.6K followers, 31.6K engagements


"Very common interview question asked these days: How do you handle token expiry without asking the user to log in again"  
[X Link](https://x.com/SumitM_X/status/2023433154401611869)  2026-02-16T16:23Z 39.6K followers, [----] engagements


"Tech Lead tells you in API request : DELETE /users/id Return [---] instead of [---] after successful deletion . What's your reply"  
[X Link](https://x.com/SumitM_X/status/2021237094199226642)  2026-02-10T14:57Z 39.6K followers, 353K engagements


"Two services insert data in different order: Service A: Insert parent Insert child Service B: Insert child Insert parent Production shows deadlocks in MySQL DB. Why"  
[X Link](https://x.com/SumitM_X/status/2022575327562879428)  2026-02-14T07:35Z 39.6K followers, 16.9K engagements


"What will be the output after clicking the button twice let score = 0; function App() function handleClick() score = score + 10; useEffect(() = console.log("Score: " score); score); return button onClick=handleClickClick/button;"  
[X Link](https://x.com/SumitM_X/status/2022603908468871509)  2026-02-14T09:28Z 39.6K followers, 12.8K engagements


"What will be the output SELECT COALESCE(NULL NULL [--] NULL 10);"  
[X Link](https://x.com/SumitM_X/status/2023435441182286161)  2026-02-16T16:32Z 39.6K followers, [----] engagements

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