Free Docker DCA Exam Dumps and DCA Exam Questions

Question No: 11

MultipleChoice

A container named 'analytics' that stores results in a volume called 'data' was created.

docker run -d --name=analytics -v data:/data app1

How are the results accessed in 'data' with another container called 'app2'?

Options

Adocker run -d --name=reports --volume=data app2

Bdocker run -d --name=reports --volumes-from=analytics app2

Cdocker run -d --name=reports --volume=app1 app2

Ddocker run -d --name=reports --mount=app1 app2

Question No: 12

MultipleChoice

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

Options

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

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

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

DNothing, devicemapper comes ready for production usage out of the box

Question No: 13

MultipleChoice

Which of the following commands wifi automatically create a volume when a container is started?

Options

A'docker container run --name nginxtest --volumes=/app nginx'

B'docker container run --name nginxtest -v /app:mount nginx'

C'docker container run --name nginxtest --volumes myvol:/app:new nginx'

D'docker container run --name nginxtest -v myvol:/app nginx'

Question No: 14

MultipleChoice

Which one of the following commands will show a list of volumes for a specific container?

Options

A'docker container logs nginx --volumes'

B'docker container inspect nginx'

C'docker volume inspect nginx'

D'docker volume logs nginx --containers'

Question No: 15

MultipleChoice

Two pods bear the same label, app: dev.

Will a label selector matching app: dev match both of these pods?

Options

AYes, as long as all the containers in those pods are passing their livenessProbes and readinessProbes.

BYes, if both pods were pre-existing when the label selector was declared.

CYes, if the pods are in the same Kubernetes namespace as the object bearing the label selector

DYes, if the pods are in the same Kubernetes namespace as the object bearing the label selector and both pods were preexisting when the label selector was declared.

Question No: 16

MultipleChoice

Which statement is correct about cluster management in Docker Enterprise Edition 3.x?

Options

AClusters can contain Windows 10 and Windows Server 2016 only.

BClusters can contain Linux, Windows Server 2016 and 2019, and Linux on IBM z Systems.

CClusters can contain Linux only.

DClusters can contain Linux and Windows Server 2008 R2 only.

Question No: 17

MultipleChoice

The following health check exists in a Dockerfile:

'HEALTCHECK CMD curl --fail http://localhost/health || exit 1'

Which of the following describes its purpose?

Options

ADefines the action taken when container health fails, which in this case will kill the container with exit status 1 B. Defines the health check endpoint on the localhost interface for external monitoring tools to monitor the health of the docker engine.

CDefines the health check endpoint on the local host interface for containers to monitor the health of the docker engine.

DDefines the health check for the containerized application so that the application health can be monitored by the Docker engine

Question No: 18

MultipleChoice

A container named 'analytics' that stores results in a volume called 'data' was created.

docker run -d --name=analytics -v data:/data app1

How are the results accessed in 'data' with another container called 'app2'?

Options

Adocker run -d --name=reports --volume=data app2

Bdocker run -d --name=reports --volumes-from=analytics app2

Cdocker run -d --name=reports --volume=app1 app2

Ddocker run -d --name=reports --mount=app1 app2

Question No: 19

MultipleChoice

You are pulling images from a Docker Trusted Registry installation configured to use self-signed certificates, and this error appears:

'x509: certificate signed by unknown authority'.

You already downloaded the Docker Trusted Registry certificate authority certificate from https://dtr.example.com/ca.

How do you trust it? (Select two.)

Options

APlace the certificate in '/etc/docker/dtr/dtr.example.com.crt' and restart the Docker daemon on all cluster nodes.

BPlace the certificate in your OS certificate path, trust the certificate system-wide, and restart the Docker daemon across all cluster nodes.

CPass '-trust-certificate ca.crt' to the Docker client.

DPass --insecure-registry to the Docker client.

EPlace the certificate in '/etc/docker/certs.d/dtr.example com/ca.crt' on all cluster nodes.