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What Docker technologies are available to support communication between containers?
- Docker connect and bridge networks
- Docker linking and bridge networks (Ans)
- Docker connect and alias networks
- None of these
Bridge networks can be defined in Docker Compose files.
- False
- True (Ans)
What command can be run to download an image from Docker Hub?
- docker images
- docker rmi [image name]
- docker pull [image name] (Ans)
- docker ps -a
Docker Kitematic can ONLY be used to download Docker images.
- False (Ans)
- True
Docker Kitematic provides a way to visually search for images hosted on __?
- VirtualBox
- Docker Hub (Ans)
- Docker Client
- Docker Machine
What syntax can be used to create a volume that Docker manages?
- docker run -v /var/www imageName (Ans)
- docker run -vol /temp:/var/temp imageName
- docker run -v /temp:/var/temp imageName
- None of these
Which of the following options can be used in a Docker Compose file?
- env_file
- container_name
- All of these (Ans)
- networks
Environment variables can be defined in Docker Compose files.
- False
- True (Ans)
What command can be used to “link” a command terminal window to a Docker machine?
- docker-machine env [machine name](Ans)
- docker rm [machine name]
- docker env [machine name]
- docker-machine environment [machine name]
Which of the following statements accurately describe a Docker volume?
- All of these (Ans)
- Can be shared and reused among containers
- Persisted even after a container is deleted
- Are not affected by updates to images
- Special type of directory in a container
What key concepts does Docker rely on?
- Virtual machines and LXC
- Images and containers (Ans)
- Images and archives
- Images and virtual machines
What command-line switches are used with legacy linking?
- –net and –name
- –link and –name (Ans)
- –com and –name
- –run and –link
Docker volumes are persisted even after a container is deleted.
- False
- True (Ans)
What tool can be used to visually work with images and containers?
- Docker Engine
- Docker Kitematic (Ans)
- None of these
- VirtualBox
Which of the following tasks can Docker Cloud perform?
- All of these (Ans)
- Create nodes
- None of these
- Create stacks
- Start and stop services
Dockerfile contains binary instructions.
- True
- False (Ans)
What command-line switch can be used to define a custom Dockerfile file name (such as node.dockerfile) when building a custom image?
- -t
- -customfile
- -f (Ans)
- -v
What Docker Client command can be used to create a container network?
- docker createNetwork
- docker build network
- docker network create (Ans)
- docker ps network
What syntax can be used to delete a Docker volume and a container?
- docker rm -rv containerName
- docker rm volume containerName
- docker rm -v containerName (Ans)
- docker rm remove-volume containerName
What task does Docker Machine perform?
- Create and manage Docker images
- Find and install Docker images
- Create and manage containers
- All of these
- Create and manage local machines (Ans)
Docker Cloud provides a browser-based terminal for services.
- True (Ans)
- False
Docker Toolbox can only be installed and run on Linux.
- False (Ans)
- True
What Docker Compose command can be used to create service images?
- docker compose
- docker-compose create
- docker-compose make
- docker-compose build (Ans)
What syntax can be used to publish an image to Docker Hub?
- docker create /imageName
- docker publish /imageName
- docker move /imageName
- docker push /imageName (Ans)
What benefits do container networks offer?
- Allow local containers to communicate with external host containers
- Allow local containers to communicate directly with host processes
- Allow containers to communicate with each other in an isolated network (Ans)
- All of these
Docker containers can be started and stopped.
- False
- True (Ans)
Docker Images consist of read-only layers.
- True (Ans)
- False
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