DevOps interview with 2+ years of experience

 I recently went through an interview with 2+ years of experience that really put my DevOps knowledge to the test. Thought I'd share some of the questions I was asked, which might help others preparing for similar roles:


1. **What are the day-to-day activities of a DevOps Engineer?**
2. **How do you overcome hurdles in DevOps?**
3. **Why do we need Shell scripting in DevOps?**
4. **What’s the difference between a `cron` job and running it under `sudo`?**
5. **How do you address security issues in `cron` jobs?**
6. **How do you set up Apache on a Linux server?**
7. **What are the steps to convert HTTP to HTTPS?**
8. **What are some limitations of Shell scripting?**
9. **What’s the difference between `$*` and `$@` in Bash?**
10. **Explain Primary Key vs. Foreign Key in databases.**
11. **What’s the difference between the `HAVING` and `WHERE` clauses in SQL?**
12. **Explain different types of JOIN commands in SQL.**
13. **What’s the difference between `DROP`, `TRUNCATE`, and `DELETE` in SQL?**
14. **How do you handle merging branches in Git?**
15. **Explain Continuous Deployment vs. Continuous Delivery.**
16. **How do you schedule tasks in Jenkins?**
17. **What’s the difference between Cron jobs and Jenkins scheduling?**
18. **What are agents in Jenkins, and how are they used?**
19. **Explain what EC2 is and how it differs from traditional VMs.**
20. **How do you create a server in EC2?**
21. **I have my own server; how do I create a VM on it?**
22. **What is AWS Lambda, and how does it work?**
23. **What is S3, and what are its use cases?**
24. **What are nodes in Kubernetes?**
25. **What is a Pod in Kubernetes?**
26. **What are Services in Kubernetes?**
27. **How does a Load Balancer work in Kubernetes?**
28. **Explain Blue-Green Deployment.**
29. **What are the basic commands in Terraform?**
30. **What are Modules in Terraform?**
31. **What are some basic Bash commands?**
32. **How do you access a service from any directory in Linux?**
33. **Where should system services be saved?**
These questions touched on a wide range of DevOps topics, from infrastructure management to Kubernetes and CI/CD pipelines. If you’re preparing for a DevOps interview, make sure you’re comfortable with these concepts! Hope this helps anyone in the community preparing for their next big opportunity. Good luck!

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