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![Techboy150 Avatar](https://lunarcrush.com/gi/w:24/cr:twitter::1854478603628527617.png) Oluwatobi Mustapha [@Techboy150](/creator/twitter/Techboy150) on x 9118 followers
Created: 2025-07-20 12:20:13 UTC

I was once asked these questions in an AWS Cloud Engineer interview. You can bookmark for your future interview. 

Q1: Your EC2 instance suddenly went unreachable. It was fine a few minutes ago. How would you start debugging it?

A: First, I’d see if the instance is still running in the console. 

Then I’d check system logs using EC2 Instance Connect or get the serial console output. 

I’d also check if a script or change caused a reboot or security group/NACL changes.


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**Related Topics**
[amazon web services](/topic/amazon-web-services)

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