DCA Practice Test

The output of which command can be used to find the architecture and operating system an image is
compatible with?

A.

docker image inspect --filter {{.Architecture}} {{.OS}} ' <image-id>

B.

docker image ls <image-id>

C.

docker image inspect --format {{.Architecture}} {{.OS}} ' <image-id>

D.

docker image info <image-id>

Which of the following is true about overlay networks?

A.

Overlay networks are created only on the manager node that you created the overlay
networking on

B.

Overlay networks are created on all cluster nodes when you create the overlay network.

C.

Overlay networks are first created on the manager nodes. Then they are created on the
worker nodes once a task is scheduled on the specific worker node.

D.

Overlay networks are only created on the manager nodes

Which of the following constitutes a production-ready devicemapper configuration for the Docker engine?

A.

Create a volume group in devicemapper and utilize the '--dm.thinpooldev' Docker daemon
option, specifying the volume group

B.

Format a partition with xfs and mount it at '/var/lib/docker'

C.

Utilize the '--storage-opt dm.directlvm_device' Docker daemon option, specifying a block
device

D.

Nothing, devicemapper comes ready for production usage out of the box

What is the docker command to find the current logging driver for a running container?

A.

docker stats

B.

docker info

C.

docker config

D.

docker inspect

Which one of the following commands will result in the volume being removed automatically once the
container has exited?

A.

'docker run --del -v /foo busybox'

B.

'docker run --read-only -v /foo busybox'

C.

'docker run --rm -v /foo busybox'

D.

'docker run --remove -v /foo busybox'