1. Which command is used to check the installed version of Docker?

   • a) docker --check
   • b) docker --version
   • c) docker --info
   • d) docker -v

   Answer: b) docker --version

2. How do you start a Docker container?

   • a) docker run [container_id]
   • b) docker start [container_id]
   • c) docker init [container_id]
   • d) docker create [container_id]
   • *Answer: b) docker start [container_id]

3. Which command lists all running Docker containers?

   • a) docker ps -a
   • b) docker ls
   • c) docker ps
   • d) docker list

   Answer: c) docker ps

4. Which command lists all Docker containers, including stopped ones?

   • a) docker ls -a
   • b) docker ps -a
   • c) docker list -a
   • d) docker all

   Answer: b) docker ps -a

5. What does CMD instruction in Dockerfile do?

   • a) Specifies the base image
   • b) Copies files from host to container
   • c) Provides the default command to run when a container starts
   • d) Sets environment variables

   Answer: c) Provides the default command to run when a container starts

6. What does ENTRYPOINT instruction in Dockerfile do?

   • a) Specifies the base image
   • b) Copies files from host to container
   • c) Provides the command to run when a container starts and cannot be overridden
   • d) Sets environment variables

Answer: c) Provides the command to run when a container starts and cannot be overridden

1. What does the FROM instruction in Dockerfile specify?

   • a) The default command to run when a container starts
   • b) The base image to use for creating the Docker image
   • c) The working directory inside the container
   • d) The files to copy from host to container

   Answer: b) The base image to use for creating the Docker image

2. Which Dockerfile instruction sets the working directory for subsequent instructions?

   • a) WORKDIR
   • b) CMD
   • c) ENTRYPOINT
   • d) RUN

   Answer: a) WORKDIR

3. Which Dockerfile instruction is used to copy files from host to container?

   • a) WORKDIR
   • b) COPY
   • c) ADD
   • d) RUN

   Answer: b) COPY

4. What is the difference between COPY and ADD instruction in Dockerfile?

   • a) ADD can copy files from a URL, COPY cannot
   • b) ADD sets environment variables, COPY does not
   • c) ADD is deprecated, COPY is not
   • d) ADD can only copy directories, COPY can copy files and directories

   Answer: a) ADD can copy files from a URL, COPY cannot

5. Which command is used to build a Docker image from a Dockerfile?

   • a) docker create
   • b) docker build
   • c) docker compile
   • d) docker make

   Answer: b) docker build

6. Which command is used to remove a Docker container?

   • a) docker rm [container_id]
   • b) docker delete [container_id]
   • c) docker remove [container_id]
   • d) docker rmi [container_id]
   • *Answer: a) docker rm [container_id]

7. Which command is used to remove a Docker image?

   • a) docker rm [image_id]
   • b) docker delete [image_id]
   • c) docker rmi [image_id]
   • d) docker remove [image_id]
   • *Answer: c) docker rmi [image_id]

8. What is the default name of the Dockerfile?

   • a) Dockerfile.txt
   • b) Dockerfile
   • c) Docker_File
   • d) dockerfile

   Answer: b) Dockerfile

9. Which command is used to view the logs of a running container?

   • a) docker logs [container_id]
   • b) docker showlogs [container_id]
   • c) docker viewlogs [container_id]
   • d) docker log [container_id]
   • *Answer: a) docker logs [container_id]

10. What does the RUN instruction do in a Dockerfile?

11. Which command is used to stop a running Docker container?

12. Which of the following command is used to push a Docker image to a registry?

13. What is the purpose of the EXPOSE instruction in a Dockerfile?