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DCA Updated Exam Dumps [2021] Practice Valid Exam Dumps Question
Docker DCA Exam Syllabus Topics:
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NEW QUESTION 63
How do you change the default logging driver for the docker daemon in Linux?
- A. Use the -log-driver' flag when you run a container.
- B. Install a logging agent on the Linux host.
- C. At the command line, type: docker log driver set <driver name>
- D. Set the value of log-driver to the name of the logging driver In the daemon.json In /etc/doc
Answer: B
NEW QUESTION 64
Will this command ensure that overlay traffic between service tasks is encrypted?
Solution: docker service create --network --secure
- A. No
- B. Yes
Answer: A
NEW QUESTION 65
Your organization has a centralized logging solution, such as Splunk.
Will this configure a Docker container to export container logs to the logging solution?
Solution: docker system events --filter splunk
- A. No
- B. Yes
Answer: A
NEW QUESTION 66
Does this describe the role of Control Groups (cgroups) when used with a Docker container?
Solution: user authorization to the Docker API
- A. No
- B. Yes
Answer: A
NEW QUESTION 67
You have created a Docker bridge network on a host with three containers attached, how do you make this containers accessible outside of the host?
- A. Use either EXPOSE or --publish to access the containers on the bridge network
- B. Use network attach to access the containers on the bridge network
- C. Use network connect to access the containers on the bridge network
- D. Use --link to access the containers on the bridge network
Correct
Answer: A
NEW QUESTION 68
One of several containers in a pod is marked as unhealthy after failing its livenessProbe many times. Is this the action taken by the orchestrator to fix the unhealthy container?
Solution: The unhealthy container is restarted.
- A. No
- B. Yes
Answer: A
NEW QUESTION 69
The following health check exists in a Dockerfile:
'HEALTCHECK CMD curl --fail http://localhost/health || exit 1'
Which of the following describes its purpose?
- A. Defines the health check endpoint on the localhost interface for external monitoring tools to monitor the health of the docker engine.
- B. Defines the health check endpoint on the local host interface for containers to monitor the health of the docker engine.
- C. Defines the action taken when container health fails, which in this case will kill the container with exit status 1
- D. Defines the health check for the containerized application so that the application health can be monitored by the Docker engine
Answer: C
NEW QUESTION 70
Does this command create a swarm service that only listens on port 53 using the UDP protocol?
Solution: 'docker service create -name dns-cache -p 53:53 -service udp dns-cache'
- A. No
- B. Yes
Answer: A
NEW QUESTION 71
Which 'docker run' flag lifts cgroup limitations?
- A. 'docker run --isolation'
- B. 'docker run --cpu-period'
- C. 'docker run --privileged'
- D. 'docker run --cap-drop'
Answer: C
NEW QUESTION 72
The Kubernetes yaml shown below describes a networkPolicy.
Will the networkPolicy BLOCK this traffic?
Solution: a request issued from a pod bearing the tier: backend label, to a pod bearing the tier: frontend label
- A. No
- B. Yes
Answer: A
NEW QUESTION 73
You add a new user to the engineering organization in DTR.
Will this action grant them read/write access to the engineering/api repository?
Solution: Add the user directly to the list of users with read/write access under the repository's Permissions tab.
- A. No
- B. Yes
Answer: B
NEW QUESTION 74
Will this Linux kernel facility limit a Docker container's access to host resources, such as CPU or memory?
Solution: cgroups
- A. No
- B. Yes
Answer: B
NEW QUESTION 75
Some Docker images take time to build through a Continuous Integration environment. You want to speed up builds and take advantage of build caching.
Where should the most frequently changed part of a Docker image be placed in a Dockerfile?
- A. in the ENTRYPOINT directive
- B. at the top of the Dockerfile
- C. after the FROM directive
- D. at the bottom of the Dockerfile
Answer: D
NEW QUESTION 76
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
Answer: A
Explanation:
Explanation
https://docs.docker.com/engine/reference/commandline/swarm/
NEW QUESTION 77
Which of the following namespaces is disabled by default and must be enabled at Docker engine runtime in order to be used?
- A. pid
- B. mnt
- C. net
- D. user
Answer: D
NEW QUESTION 78
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 namespace for each application and add all the resources to it.
- A. No
- B. Yes
Answer: A
NEW QUESTION 79
Are these conditions sufficient for Kubernetes to dynamically provision a persistentVolume, assuming there are no limitations on the amount and type of available external storage?
Solution: A default storageClass is specified, and subsequently a persistentVolumeClaim is created.
- A. No
- B. Yes
Answer: B
NEW QUESTION 80
Can this set of commands identify the published port(s) for a container?
Solution: docker container inspect', 'docker port'
- A. No
- B. Yes
Answer: B
NEW QUESTION 81
After creating a new service named 'http', you notice that the new service is not registering as healthy. How do you view the list of historical tasks for that service by using the command line?
- A. 'docker inspect http'
- B. 'docker service ps http'
- C. 'docker ps http'
- D. 'docker service inspect http'
Answer: D
NEW QUESTION 82
An application image runs in multiple environments, with each environment using different certificates and ports.
Is this a way to provision configuration to containers at runtime?
Solution: Provision a Docker config object for each environment.
- A. No
- B. Yes
Answer: B
NEW QUESTION 83
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. A dockerfile
- C. docker save
- D. A docker-compose.yml file
Answer: A
NEW QUESTION 84
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