Docker DCA Quiz 1 Topic 1 Questions 1-5

Question: 1

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

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.

Show Answer

Question: 2

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

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

Show Answer

Question: 3

The following health check exists in a Dockerfile:

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

Which of the following describes its purpose?

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

Show Answer

Question: 4

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'?

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

Show Answer

Question: 5

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.)

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.

Show Answer

Docker DCA Quiz:1 Topic:1 Questions:1-5