Docker Interview Questions and Answer Part – 25

Docker Kitematic can ONLY be used to download Docker images.

• True
• False (Ans)

Services can be organized into __ with Docker Cloud.

• roles
• stacks (Ans)
• zones
• groups

Docker works the same way as virtual machines.

• False (Ans)
• True

What Docker Compose command can be used to create service images?

• docker-compose create
• docker compose
• docker-compose build (Ans)
• docker-compose make

Docker Toolbox can only be installed and run on Linux.

• False (Ans)
• True

Each instruction in a Dockerfile creates an intermediate container as the image is built.

• True (Ans)
• False

What key concepts does Docker rely on?

• Images and containers (Ans)
• Images and archives
• Images and virtual machines
• Virtual machines and LXC

Setting up communications between multiple containers always requires multiple Docker run statements to be executed.

• False (Ans)
• True

Docker volumes are persisted even after a container is deleted.

• True (Ans)
• False

Docker Cloud provides a browser-based terminal for services.

• False
• True (Ans)

You’ve run the “docker ps” command but no containers are showing. Why?

• You don’t have an image for the container.
• All containers are stopped. (Ans)
• None of these
• All containers are running.

What options are available for getting source code into Docker Containers?

• Create a custom docker image with the source code or create a data volume pointing to your dev machine (Ans)
• Use the Dockerfile “embedcode” instruction
• Create a custom container with the source code and use the “mount” command to point to your dev machine
• None of these

What command can be used to “link” a command terminal window to a Docker machine?

• docker env [machine name]
• docker-machine environment [machine name]
• docker-machine env [machine name] (Ans)
• docker rm [machine name]

What syntax can be used to delete a Docker volume and a container?

• docker rm remove-volume containerName
• docker rm -rv containerName
• docker rm volume containerName
• docker rm -v containerName (Ans)

VirtualBox is required to use Docker on Mac and Windows dev machines.

• True (Ans)
• False

Which of the following use Docker’s layered file system?

• Docker images only
• Docker containers only
• All of these
• VirtualBox
• Docker images and containers (Ans)

What syntax can be used to create a volume that Docker manages?

• docker run -v /temp:/var/temp imageName
• docker run -vol /temp:/var/temp imageName
• None of these
• docker run -v /var/www imageName (Ans)

What syntax can be used to convert a Dockerfile into an Image?

• docker run -t /tagName .
• docker create -t /tagName .
• docker convert -t /tagName .
• docker build -t /tagName . (Ans)

Which of the following tools are included in Docker Toolbox?

• Docker Client
• VirtualBox
• All of these (Ans)
• Docker Kitematic
• Docker Machine

What command can be run to download an image from Docker Hub?

• docker ps -a
• docker pull [image name] (Ans)
• docker rmi [image name]
• docker images

Rajesh Kumar

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