Docker Docker Certified Associate DCA Questions & Answers

• Question 11:

  Does this describe the role of Control Groups (cgroups) when used with a Docker container? Solution: accounting and limiting of resources

  A. Yes

  B. No

  Correct Answer: B

• Question 12:

  Which of the following are types of namespaces used by Docker to provide isolation? (Choose 2.)

  A. Host

  B. Network

  C. Process ID

  D. Authentication

  E. Storage

  Correct Answer: BC

• Question 13:

  Will this command ensure that overlay traffic between service tasks is encrypted? Solution: docker service create --network --secure

  A. Yes

  B. No

  Correct Answer: B

• Question 14:

  Which of the following namespaces is disabled by default and must be enabled at Docker engine runtime in order to be used?

  A. user

  B. pid

  C. net

  D. mnt

  Correct Answer: A

• Question 15:

  Two development teams in your organization use Kubernetes and want to deploy their applications while

  ensuring that Kubernetes-specific resources, such as secrets, are grouped together for each application.

  Is this a way to accomplish this?

  Solution: Create one pod and add all the resources needed for each application

  A. Yes

  B. No

  Correct Answer: B

• Question 16:

  You created a new service named 'http' and discover it is not registering as healthy. Will this command enable you to view the list of historical tasks for this service?

  Solution: 'docker service ps http'

  A. Yes

  B. No

  Correct Answer: B

• Question 17:

  Does this describe the role of Control Groups (cgroups) when used with a Docker container?

  Solution: user authorization to the Docker API

  A. Yes

  B. No

  Correct Answer: B

• Question 18:

  You want to provide a configuration file to a container at runtime. Does this set of Kubernetes tools and steps accomplish this?

  Solution: Turn the configuration file into a configMap object and mount it directly into the appropriate pod and container using the .spec.containers.configMounts key.

  A. Yes

  B. No

  Correct Answer: B

• Question 19:

  Which of the following is true about using the '-P' option when creating a new container?

  A. Docker binds each exposed container port to a random port on all the host's interface

  B. Docker gives extended privileges to the container.

  C. Docker binds each exposed container port to a random port on a specified host interface

  D. Docker binds each exposed container port with the same port on the host

  Correct Answer: A

• Question 20:

  A user is having problems running Docker. Which of the following will start Docker in debug mode?

  A. Set the debug key to true in the 'daemon.json' file.

  B. Start the 'dockerd' process manually with the '--logging' flag set to debug

  C. Set the logging key to debug in the 'daemon.json' file.

  D. Start the 'dockerd' process manually with the '--raw-logs' flag set to debug

  Correct Answer: A