Day 21 Task: Docker Important interview Questions.

Docker Interview

Docker is a good topic to ask in DevOps Engineer Interviews, mostly for freshers. One must surely try these questions in order to be better in Docker

Questions

• What is the Difference between an Image, Container and Engine?

• What is the Difference between the Docker command COPY vs ADD?

• What is the Difference between the Docker command CMD vs RUN?

• How Will you reduce the size of the Docker image?

• Why and when to use Docker?

• Explain the Docker components and how they interact with each other.

• Explain the terminology: Docker Compose, Docker File, Docker Image, Docker Container?

• In what real scenarios have you used Docker?

• Docker vs Hypervisor?

• What are the advantages and disadvantages of using docker?

• What is a Docker namespace?

• What is a Docker registry?

• What is an entry point?

• How to implement CI/CD in Docker?

• Will data on the container be lost when the docker container exits?

• What is a Docker swarm?

• What are the docker commands for the following:

  • view running containers

  • command to run the container under a specific name

  • command to export a docker

  • command to import an already existing docker image

  • commands to delete a container

  • command to remove all stopped containers, unused networks, build caches, and dangling images?

• What are the common docker practices to reduce the size of Docker Image?