{"id":3698,"date":"2024-03-06T11:42:15","date_gmt":"2024-03-06T11:42:15","guid":{"rendered":"https:\/\/www.skillvertex.com\/blog\/?p=3698"},"modified":"2024-03-06T11:42:15","modified_gmt":"2024-03-06T11:42:15","slug":"docker-interview-questions-and-answers","status":"publish","type":"post","link":"https:\/\/www.skillvertex.com\/blog\/docker-interview-questions-and-answers\/","title":{"rendered":"51 Docker Interview Questions And Answers 2024"},"content":{"rendered":"\n

1. What is Hypervisor?<\/strong><\/p>\n\n\n\n

2. What is virtualization?<\/strong><\/p>\n\n\n\n

3. What is containerization?<\/strong><\/p>\n\n\n\n

4. Difference between virtualization and containerization<\/strong><\/p>\n\n\n\n

5. What is Docker?<\/strong><\/p>\n\n\n\n

6. What is a Docker Container?<\/strong><\/p>\n\n\n\n

7. What are Docker Images?<\/strong><\/p>\n\n\n\n

8. What is Docker Hub?<\/strong><\/p>\n\n\n\n

9. Explain Docker Architecture?<\/strong><\/p>\n\n\n\n

10. What is a Dockerfile?<\/strong><\/p>\n\n\n\n

11. Tell us something about Docker Compose.<\/strong><\/p>\n\n\n\n

12. What is Docker Swarm?<\/strong><\/p>\n\n\n\n

13. What is a Docker Namespace?<\/strong><\/p>\n\n\n\n

14. What is the lifecycle of a Docker Container?<\/strong><\/p>\n\n\n\n

15. What is Docker Machine?<\/strong><\/p>\n\n\n\n

16. How to check for Docker Client and Docker Server version?<\/strong><\/p>\n\n\n\n

17. How do you get the number of containers running, paused and stopped?<\/strong><\/p>\n\n\n\n

18. If you vaguely remember the command and you\u2019d like to confirm it, how will you get help on that particular command?<\/strong><\/p>\n\n\n\n

19. How to login into docker repository?<\/strong><\/p>\n\n\n\n

20. If you wish to use a base image and make modifications or personalize it, how do you do that?<\/strong><\/p>\n\n\n\n

21. How do you create a docker container from an image?<\/strong><\/p>\n\n\n\n

22. How do you list all the running containers?<\/strong><\/p>\n\n\n\n

23. Suppose you have 3 containers running and out of these, you wish to access one of them. How do you access a running container?<\/strong><\/p>\n\n\n\n

24. How to start, stop and kill a container?<\/strong><\/p>\n\n\n\n

25. Can you use a container, edit it, and update it? Also, how do you make it a new and store it on the local system?<\/strong><\/p>\n\n\n\n

26. Once you\u2019ve worked with an image, how do you push it to docker hub?<\/strong><\/p>\n\n\n\n

27. How to delete a stopped container?<\/strong><\/p>\n\n\n\n

28. How to delete an image from the local storage system?<\/strong><\/p>\n\n\n\n

29. How to build a Dockerfile?\u00a0<\/strong><\/p>\n\n\n\n

30. Do you know why\u00a0docker system prune<\/em>\u00a0is used? What does it do?<\/strong><\/p>\n\n\n\n

31. Will you lose your data, when a docker container exists?<\/strong><\/p>\n\n\n\n

32. Where all do you think Docker is being used?<\/strong><\/p>\n\n\n\n

33. How is Docker different from other containerization methods?<\/strong><\/p>\n\n\n\n

34. Can I use JSON instead of YAML for my compose file in Docker?<\/strong><\/p>\n\n\n\n

35. How have you used Docker in your previous position?<\/strong><\/p>\n\n\n\n

36. How far do Docker containers scale? Are there any requirements for the same?<\/strong><\/p>\n\n\n\n

37. What platforms does docker run on?<\/strong><\/p>\n\n\n\n

38. Is there a way to identify the status of a Docker container?<\/strong><\/p>\n\n\n\n

39. Can you remove a paused container from Docker?<\/strong><\/p>\n\n\n\n

40. Can a container restart by itself?<\/strong><\/p>\n\n\n\n

41. Is it better to directly remove the container using the rm command or stop the container followed by remove container?<\/strong><\/p>\n\n\n\n

42. Will cloud overtake the use of Containerization?<\/strong><\/p>\n\n\n\n

43. How many containers can run per host?<\/strong><\/p>\n\n\n\n

44. Is it a good practice to run stateful applications on Docker?<\/strong><\/p>\n\n\n\n

45. Suppose you have an application that has many dependant services. Will docker compose wait for the current container to be ready to move to the running of the next service?<\/strong><\/p>\n\n\n\n

46. How will you monitor Docker in production?<\/strong><\/p>\n\n\n\n

47. Is it a good practice to run Docker compose in production?<\/strong><\/p>\n\n\n\n

48. What changes are expected in your docker compose file while moving it to production?<\/strong><\/p>\n\n\n\n

49. Have you used Kubernetes? If you have, which one would you prefer amongst Docker and Kubernetes?<\/strong><\/p>\n\n\n\n

50. Are you aware of load balancing across containers and hosts? How does it work?<\/strong><\/p>\n\n\n\n

51. What are Docker\u2019s most notable features?<\/strong><\/p>\n\n\n\n

Docker Interview Questions And Answers<\/h2>\n\n\n\n
    \n
  1. Hypervisor:<\/strong><\/li>\n<\/ol>\n\n\n\n

    Ans.A hypervisor, also known as a Virtual Machine Monitor (VMM), is a software or hardware component that allows multiple operating systems to share a single hardware host. It creates and runs virtual machines (VMs), each of which can run its own operating system.<\/p>\n\n\n\n

    2.Virtualization:<\/strong><\/p>\n\n\n\n

    Ans.Virtualization is the process of creating a virtual (rather than actual) version of something, such as an operating system, server, storage device, or network resources. It enables the running of multiple operating systems or applications on a single physical machine.<\/p>\n\n\n\n

    3.Containerization<\/strong><\/p>\n\n\n\n

    Ans.Containerization is a lightweight form of virtualization that encapsulates an application and its dependencies into a container. Containers share the host operating system’s kernel and isolate the application processes, making them portable and efficient.<\/p>\n\n\n\n

    4.Difference between Virtualization and Containerization:<\/strong><\/p>\n\n\n\n

    Ans.<\/p>\n\n\n\n