L1 – AWS & DevOps Interview Questions..

1. What is the Cloud? Define Cloud Computing.

2. What are the benefits of Cloud Computing?

3. What is On-demand computing in CloudComputing?

4. What are the different layers of Cloud computing?

5. What Resources are provided by Infrastructure as a Service (IAAS) provider?

6. What is the benefit of Platform as a Service?

7. What is the main disadvantage of PaaS?

8. What are the different deployment models in Cloud computing?

9. What is the difference between Scalability and Elasticity?

10. What is Software as a Service?

11. What are the different types of Data Centers in Cloud computing?

12. How is a traditional datacenter different from a cloud environment?

13. What is the scenario in which public cloud is preferred over private cloud?

14. What is Virtual Private Network (VPN)?

15. What are the main components of a VPN?

16. How will you secure the application data for transport in a cloud environment?

17. What are the large-scale databases available in the Cloud?

18. What is Auto-scaling in Cloud computing?

19. What is a Hypervisor in Cloud Computing?

20. Why is automation of deployment very important in Cloud architecture?

21. What are the main components in Amazon Web Services and GCP/Azure?

22. What are the reasons for the popularity of Cloud Computing architecture?

23. Can you explain the various phases of the Software Development Life Cycle (SDLC)

and their significance?

24. What is the key difference between Waterfall and Agile SDLC methodologies, and

when would you choose one over the other?

25. How do you ensure quality assurance and testing in the SDLC process, and why is it

important?

26. Can you discuss the role of version control systems (e.g., Git) in SDLC, and how do

they benefit the development process?

27. Explain the OSI model and its seven layers. How does it help in understanding

network communication?

28. What is the difference between TCP and UDP? When would you use one over the

other in a network application?

29. How do you ensure network security and data integrity in a corporate network

environment?

30. Explain the concept of IP addressing, including IPv4 and IPv6. Why is IPv6 adoption

important, and what are the benefits it offers?

31. What is a subnet mask, and how is it used in IP networking? Can you provide an

example of subnetting in a real-world scenario?

32. Explain the Git workflow and key Git commands involved in collaborating on a project

with a team. How does Git help in version control and collaboration?

33. How can Git branching be beneficial in a DevOps context? Explain the purpose of

feature branches, release branches, and how Git flow can streamline the development

process.

34. Explain the differences between a shell script and a regular programming script (e.g.,

Python, JavaScript). When would you choose to write a shell script over another

scripting language?

35. Write a simple shell script that takes a list of filenames as input and renames them by

adding a timestamp to the filenames. Explain the logic behind your script.

36. What are environment variables in shell scripting, and how are they useful? Provide

an example of how you would use environment variables in a shell script.

37. Explain the core principles of DevOps and why they are important in modern software

development and IT operations.

38. Can you describe the concept of continuous integration (CI) and continuous

deployment (CD)? How do CI/CD pipelines streamline the software development and

delivery process?

39. How do you check the system's current resource usage, and what command would

you use for this purpose?

40. What is the significance of the "chmod" command in Linux, and how would you

change file permissions using it?

41. Describe what an SSH key is and how it is used for secure authentication in Linux.

42. How would you monitor system performance in real-time on a Linux server, and which

tools or commands can you use for this?

43. What is the purpose of the "iptables" command, and how do you use it to manage

firewall rules in Linux?

44. Explain the role of "cron" and "anacron" in task scheduling in Linux, and provide an

example of each.

45. How would you check the free disk space on a Linux system? What command(s)

would you use for this?

46. What is a Linux distribution, and can you name a few popular Linux distributions?

How might your choice of distribution impact your DevOps tasks?

47. Explain the concept of "package management" in Linux. How do package managers

like APT, YUM, and DNF differ, and when would you use one over the other?

48. Explain the purpose of the "grep" command in Linux and provide an example of its

usage.

49. How can you compress and decompress files in Linux?

50. What is the difference between SSH and SSL?