Docker Concepts

What is Docker Compose used for?

• Docker Compose is used to deploy applications on Kubernetes.

• Docker Compose is used to define and run multi-container Docker applications.

• Docker Compose is used to manage single-container Docker applications.

• Docker Compose is used to monitor Docker containers.

Name one Docker command used to list all running containers.

• docker ps

• docker containers

• docker list

• docker ls

What are Docker images?

• Docker images are virtual machines that require a hypervisor to run.

• Docker images are lightweight, standalone, executable packages that contain everything needed to run a piece of software.

• Docker images are only used for storing data, not for running software.

• Docker images are large, heavy files that require a lot of storage space.

How are Docker containers different from virtual machines?

• Docker containers and virtual machines both require their own OS and resources.

• Docker containers are heavier and require more resources than virtual machines.

• Docker containers and virtual machines have the same level of isolation and resource usage.

• Docker containers are lightweight and share the host OS kernel, while virtual machines have their own OS and require more resources.

What is the purpose of Docker volumes?

• The purpose of Docker volumes is to persist data generated by Docker containers.

• The purpose of Docker volumes is to manage Docker containers.

• The purpose of Docker volumes is to store Docker images.

• The purpose of Docker volumes is to improve Docker network performance.

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

• docker start

• docker run

• docker create

• docker build

How can you remove a Docker container?

• docker delete [container ID or name]

• docker remove [container ID or name]

• docker erase [container ID or name]

• docker rm [container ID or name]

What is the purpose of the 'docker run' command?

• To create and run a new container from a Docker image.

• To remove a Docker container.

• To build a Docker image.

• To stop a running container.

How can you specify a volume when running a Docker container?

• -p or --port flag

• -s or --storage flag

• -m or --mount flag

• -v or --volume flag

What is the purpose of the 'docker stop' command?

• To stop running containers

• To pause running containers

• To start running containers

• To delete running containers