Are you looking to test your knowledge of Docker or prepare for an interview? This collection of over 200 Docker multiple-choice questions (MCQs) is perfect for learners of all levels. These questions cover everything from basic concepts like containerization and Docker commands to advanced topics like networking, orchestration, and security.
Each question is designed to help you strengthen your understanding of Docker, whether you’re just starting out or looking to refine your skills as an expert. With detailed answers and explanations, you can learn while testing yourself.
Topics include:
- Introduction to Docker and containerization
- Managing Docker images and containers
- Networking and orchestration with Docker Compose and Swarm
- Security and resource management in Docker
- Using Docker in CI/CD pipelines and advanced Kubernetes integration
Whether you’re a student, a developer, or a DevOps professional, these questions will help you gain confidence and practical knowledge. Use them to prepare for exams, certifications, or real-world applications.
Start exploring these free MCQs and level up your Docker expertise today!
10 Docker Sample MCQs with Answers
1. What is Docker primarily used for?
a) Virtualization of hardware
b) Containerization of applications
c) Networking services
d) Database management
Answer: b) Containerization of applications
2. Which command is used to list all running Docker containers?
a) docker ps
b) docker run
c) docker ls
d) docker containers
Answer: a) docker ps
3. What is the default storage driver for Docker on Linux?
a) aufs
b) overlay2
c) zfs
d) devicemapper
Answer: b) overlay2
4. Which file is used to define the instructions for building a Docker image?
a) docker-compose.yml
b) Dockerfile
c) buildfile.json
d) containerfile
Answer: b) Dockerfile
5. What does the -d flag do when starting a Docker container?
a) Deletes the container after it stops
b) Runs the container in detached mode
c) Displays debug logs
d) Deploys the container to Docker Hub
Answer: b) Runs the container in detached mode
6. What command is used to create a new Docker network?
a) docker network create
b) docker network init
c) docker network add
d) docker create network
Answer: a) docker network create
7. Which of the following is a Docker orchestration tool?
a) Kubernetes
b) Jenkins
c) Ansible
d) Puppet
Answer: a) Kubernetes
8. How do you limit the memory usage of a Docker container?
a) --limit-memory
b) --memory
c) --max-mem
d) --set-mem
Answer: b) --memory
9. What is the purpose of the docker exec command?
a) To create a new container
b) To run a command inside a running container
c) To stop a running container
d) To export a container
Answer: b) To run a command inside a running container
10. What is Docker Compose used for?
a) Building Docker images
b) Managing multiple containers as a single service
c) Debugging containers
d) Monitoring container performance
Answer: b) Managing multiple containers as a single service