DCA Practice Test

What is the docker command to setup a swarm?

A.

docker swarm init

B.

docker swarm create

C.

docker init swarm

D.

docker create swarm

From a DevOps process standpoint, it is best practice to keep changes to an application in version control. Which of the following will allow changes to a docker Image to be stored in a version control system?

A.

docker commit

B.

docker save

C.

A docker-compose.yml file

D.

A dockerfile

Which of the following statements is true about secrets?

A.

Secrets can be created from any node in the cluster.

B.

Secrets can be modified after they are created.

C.

Secret are stored unencrypted on manager nodes.

D.

Secrets can be created using standard input (STDIN) and a file.

Which statement is true about DTR garbage collection?

A.

Garbage collection removes unreferenced image layers from DTR's backend storage.

B.

Garbage collection removes exited containers from cluster nodes.

C.

Garbage collection removes DTR images that are older than a configurable of days

D.

Garbage collection removes unused volumes from cluster nodes

Will this Linux kernel facility limit a Docker container's access to host resources, such as
CPU or memory?
Solution: seccomp

A.

Yes

B.

No