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Docker job interview questions

Docker is a great platform to make your software development flows more flexible thanks to containerization. Mastering Docker makes software engineers way more efficient, which is a reason why it is widely used in companies across the world.

QUESTION 1:

What is container orchestration and why should we use it?

Docker Junior

QUESTION 2:

What is a Docker image registry?

Docker Junior

QUESTION 3:

How do you import a Docker image to a Docker host from a zip file?

DockerDocker CLI Junior

QUESTION 4:

How do you export a Docker image to a zip file?

DockerDocker CLI Junior

QUESTION 5:

How does load balancing across Docker containers and hosts work?

Docker Junior

QUESTION 6:

What changes do you usually need to do to your Docker compose file when deploying to production?

Docker Junior

QUESTION 7:

Is it a good practice to run Docker compose in production?

Docker Junior

QUESTION 8:

How do you monitor Docker in production?

Docker Junior

QUESTION 9:

You have multiple dependent Docker containers. How can you make them to wait for their dependencies to become ready?

Docker Junior

QUESTION 10:

Is it a good practice to run stateful applications on Docker?

Docker Junior

QUESTION 11:

How many containers can run per host?

Docker Junior

QUESTION 12:

Do you think that Docker will be replaced by Cloud?

Docker Junior

QUESTION 13:

Can you remove a paused container from Docker?

Docker Junior

QUESTION 14:

How can you check a Docker contaienr state?

Docker Junior

QUESTION 15:

What are the possible state of a Docker container?

Docker Junior

QUESTION 16:

What is your experience with Docker? How did you use it in your career?

Docker Junior

QUESTION 17:

What are the use cases the Docker can be used in?

Docker Junior

QUESTION 18:

How can you rollback all changes that you did to a containerized system under test that consists of one Docker container after you finished testing of a specific test case?

Docker Junior

QUESTION 19:

What is going to happen with your data if you stop a Docker container? Will it be lost or not?

Docker Junior

QUESTION 20:

How can you automate Docker container management programatically using .NET Core?

.NET CoreDocker Junior

QUESTION 21:

How do you run Docker container in a detached mode?

DockerDocker CLI Junior

QUESTION 22:

What is Docker Detached Mode good for and how do you use it?

Docker Junior

QUESTION 23:

How do you remove all stopped Docker containers, unused networks, dangling images and build caches?

DockerDocker CLI Junior

QUESTION 24:

How do you build a Dockerfile?

DockerDocker CLI Junior

QUESTION 25:

How do you delete a Docker image from the local file system?

DockerDocker CLI Junior

QUESTION 26:

How do you delete a stopped Docker contaienr?

DockerDocker CLI Junior

QUESTION 27:

How do you save a Docker container to Docker Hub?

DockerDocker CLI Junior

QUESTION 28:

How do you create a new Docker image for an existing container including all changes done to the container?

DockerDocker CLI Junior

QUESTION 29:

How do you kill a Docker container?

DockerDocker CLI Junior

QUESTION 30:

How do you stop a Docker container?

DockerDocker CLI Junior

QUESTION 31:

How do you start a Docker container?

DockerDocker CLI Junior

QUESTION 32:

How do you access a running Docker container?

DockerDocker CLI Junior

QUESTION 33:

How do you list all the running Docker containers?

DockerDocker CLI Junior

QUESTION 34:

How do you get an image from Docker Hub in order to modify it or personalize it?

DockerDocker CLI Junior

QUESTION 35:

How do you login into Docker repository?

DockerDocker CLI Junior

QUESTION 36:

How do you get more information about a specific docker command using Docker CLI?

DockerDocker CLI Junior

QUESTION 37:

How do you get the number of contaienrs that are running or are paused or stopped on your machine?

DockerDocker CLI Junior

QUESTION 38:

How do you check the Docker client and server version?

DockerDocker CLI Junior

QUESTION 39:

What is Docker Machine?

Docker Junior

QUESTION 40:

What is the lifecycle of a Docker Container?

Docker Junior

QUESTION 41:

What is Docker Swarm?

Docker Junior

QUESTION 42:

What is Docker Compose?

Docker Junior

QUESTION 43:

What is a Dockerfile?

Docker Junior

QUESTION 44:

What are the key building stones of Docker architecture?

Docker Junior

QUESTION 45:

What is Docker Hub?

Docker Junior

QUESTION 46:

What is a difference between Docker container and Docker image?

Docker Junior

QUESTION 47:

What is a Docker image?

Docker Junior

QUESTION 48:

What is a Docker container?

Docker Junior

QUESTION 49:

What is Docker?

Docker Junior

QUESTION 50:

What is a difference between virtualization and containerization?

Docker Junior

QUESTION 51:

What is Containerization?

Docker Junior

QUESTION 52:

What is a Bare metal hypervisor?

Docker Junior

QUESTION 53:

What is a Hosted hypervisor?

Docker Junior

QUESTION 54:

What is Virtualization?

Docker Junior

QUESTION 55:

What is Hypervisor?

Docker Junior

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