30 Docker Interview Questions to Ace DevOps Interview

dev.to 의 Alex 님의 글을 공부시 참고하고자 가져왔습니다.

출처: https://dev.to/aershov24/30-docker-interview-questions-to-ace-devops-engineer-interview-2277?fbclid=IwAR1zJ2dTlcuWzJzksqcfjkv6rpUZX0oVz5WJFxG0b-921WSed5Fn7vzlJ3Y

해당글은 QnA 로 구성되어 있지만, Question 부분만 가져왔습니다.

With substantial growth forecasted for the application container market (from $762millionin2016to$2.7 billion by 2020, according to 451 Research), demand for container skills is at a high. Software engineers, Information Architects and DevOps engineers with Docker are in seriously high demand.

Q1. What is the need for DevOps?

Topic : DevOps
Difficulty : *

Q2. What is Docker?

Topic : Docker
Difficulty : *

Q3. What are the advantages of DevOps?

Topic : DevOps
Difficulty : **

Q4. What is the function of CI(Continuous Integration) server?

Topic : DevOps
Difficulty : **

Q5. How to build environment-agnostic systems with Docker?

Topic : Docker
Difficulty : **

Q6. What is the difference between the ‘COPY’ and ‘ADD’ commands in a Dockerfile?

Topic : Docker
Difficulty : **

Q7. What is Docker image?

Topic : Docker
Difficulty : **

Q8. What is Docker container?

Topic : Docker
Difficulty : **

Q9. What is Docker hub?

Topic : Docker
Difficulty : **

Q10. What are the various states that a Docker container can be in at any given point in time?

Topic : Docker
Difficulty : **

Q11. Is there a way to identify the status of a Docker container?

Topic : Docker
Difficulty : **

Q12. What are the most common instructions in Dockerfile?

Topic : Docker
Difficulty : **

Q13. What type of applications - Stateless or Stateful are more suitable for Docker Container?

Topic : Docker
Difficulty : **

Q14.Explain basic Docker usage workflow

Topic : Docker
Difficulty : ***

Q15. What is the difference between Docker Image and Layer?

Topic : Docker
Difficulty : ***

Q16. What is virtualisation?

Topic : Docker
Difficulty : ***

Q17. What is Hypervisor?

Topic : Docker
Difficulty : ***

Q18. What is Docker Swarm?

Topic : Docker
Difficulty : ***

Q19. How will you monitor Docker in production?

Topic : Docker
Difficulty : ***

Q20. What is an orphant volume and how to remove it?

Topic : Docker
Difficulty : **

Q21. What is Paravirtualization?

Topic : Docker
Difficulty : **

Q22. How is Docker different from a virtual machine?

Topic : Docker
Difficulty : **

Q23. Can you explain dockerfile ONBUILD instruction?

Topic : Docker
Difficulty : **

Q24. Is it good practice to run stateful applications on Docker? What are the scenarios where Docker best fits in?

Topic : Docker
Difficulty : **

Q25. Can you run Docker containers natively on Windows?

Topic : Docker
Difficulty : **

Q26. How does Docker run containers in non-Linux systems?

Topic : Docker
Difficulty : *****

Q27. How containers works at low level?

Topic : Docker
Difficulty : *****

Q28. Name some limitations of containers vs VM

Topic : Docker
Difficulty : *****

Q29. How to use Docker with multiple environments?

Topic : Docker
Difficulty : *****

Q30. Why Docker compose does not wait for a container to be ready before moving on to start next service in dependency order?

Topic : Docker
Difficulty : *****