Pass Docker DCA Exam Info and Free Practice Test
New 2022 Latest Questions DCA Dumps - Use Updated Docker Exam
NEW QUESTION 10
The following Docker Compose file is deployed as a stack:
Is this statement correct about this health check definition?
Solution: Health checks test for app health ten seconds apart. Three failed health checks transition the container into "unhealthy" status.
- A. Yes
- B. No
Answer: A
NEW QUESTION 11
Wha is the purpose of Docker Content Trust?
- A. Docker registry TLS verification and encryption
- B. Signing and verification of image tags
- C. Indicating an image on Docker Hub is an official image
- D. Enabling mutual TLS between the Docker client and server
Answer: B
NEW QUESTION 12
A server is running low on disk space. What command can be used to check the disk usage of images, containers, and volumes for Docker engine?
- A. 'docker system df'
- B. 'docker system free'
- C. 'docker system ps'
- D. 'docker system prune'
Answer: A
NEW QUESTION 13
A server is running low on disk space. What command can be used to check the disk usage of images,
containers, and volumes for Docker engine?
- A. 'docker system df'
- B. 'docker system free'
- C. 'docker system ps'
- D. 'docker system prune'
Answer: A
NEW QUESTION 14
When an application being managed by UCP fails, you would like a summary of all requests made to the UCP API in the hours leading up to the failure.
What must be configured correctly beforehand for this to be possible?
- A. All engines in the cluster must have their log driver set to the metadata' or request' level.
- B. UCP logging levels must be set to the info' or debug' level.
- C. Set the logging level in theconfig object for the ucp-kube-api-server container to warning or higher.
- D. UCP audit logs must be set to the metadata' or request' level.
Answer: D
NEW QUESTION 15
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 inspect http'
- A. No
- B. Yes
Answer: A
NEW QUESTION 16
Which statement is true?
- A. CMD shell format uses this form ["param", param", "param"]
- B. CMD is used to run the software is the image along with any arguments
- C. ENTRYPOINT cannot be overriden in the "docker container run" command
- D. ENTRYPOINT cannot be used in conjuction with CMD
Answer: A
NEW QUESTION 17
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 --link to access the containers on the bridge network
Correct - B. Use either EXPOSE or --publish to access the containers on the bridge network
- C. Use network attach to access the containers on the bridge network
- D. Use network connect to access the containers on the bridge network
Answer: B
NEW QUESTION 18
You want to create a container that is reachable from its host's network. Does this action accomplish this?
Solution: Use either EXPOSE or --publish to access the containers on the bridge network
- A. Yes
- B. No
Answer: A
NEW QUESTION 19
Will this configuration achieve fault tolerance for managers in a swarm?
Solution: only two managers, one active and one passive.
- A. No
- B. Yes
Answer: A
NEW QUESTION 20
Which networking drivers allow you to enable multi-host network connectivity between containers?
- A. bridge, user-defined, host
- B. host, macvlan, overlay, user-defined
- C. macvlan, ipvlan, and overlay
- D. bridge, macvlan, ipvlan, overlay
Answer: C
NEW QUESTION 21
Which of the following is true about overlay networks?
- A. Overlay networks are only created on the manager nodes.
- B. Overlay networks are first created on the manager nodes. Then they are created on the
worker nodes once a task is scheduled on the specific worker node. - C. Overlay networks are created only on the manager node that you created the overlay
networking on - D. Overlay networks are created on all cluster nodes when you create the overlay network.
Answer: D
NEW QUESTION 22
Which statement is true about DTR garbage collection?
- A. Garbage collection removes DTR images that are older than a configurable of days
- B. Garbage collection removes exited containers from cluster nodes.
- C. Garbage collection removes unreferenced image layers from DTR's backend storage.
- D. Garbage collection removes unused volumes from cluster nodes
Answer: C
NEW QUESTION 23
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. No
- B. Yes
Answer: A
NEW QUESTION 24
What is the recommended way to configure the daemon flags and environment variables for your Docker daemon in a platform independent way?
- A. Set the configuration options using the ENV variable
- B. Set the configuration DOCKER_OPTS in '/etc/default/docker'
- C. Set the configuration options in '/etc/docker/daemon.json'
- D. Using 'docker config' to set the configuration options.
Answer: C
NEW QUESTION 25
Will this command list all nodes in a swarm cluster from the command line?
Solution: 'docker Is -a'
- A. Yes
- B. No
Answer: A
NEW QUESTION 26
A host machine has four CPUs available and two running containers. The sysadmin would like to assign two CPUs to each container.
Which of the following commands achieves this?
- A. Set the '--cpuset-cpus' flag to '.5' on both containers
- B. Set the '--cpuset-cpu's flag to '1.3' on one container and '2.4' on the other container.
- C. Set the '--cpuset-cpus' flag of the 'dockerd' process to the value 'even-spread'
- D. Set the '--cpu-quota' flag to '1.3' on one container and '2,4' on the other container.
Answer: A
NEW QUESTION 27
The following Docker Compose file is deployed as a stack:
Is this statement correct about this health check definition?
Solution: Health checks test for app health ten seconds apart. If the test fails, the container will be restarted three times before it gets rescheduled.
- A. No
- B. Yes
Answer: A
NEW QUESTION 28
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 29
Will this command display a list of volumes for a specific container?
Solution: docker container logs nginx --volumes'
- A. No
- B. Yes
Answer: A
NEW QUESTION 30
You set up an automatic pruning policy on a DTR repository to prune all images using Apache licenses. What effect does this have on images in this repository?
- A. Matching images are untagged once they are older than the pruning threshold set in the repository's Settings tab.
- B. Matching images are deleted during the next prune Job.
- C. Matching images are untagged during the next prune job, and subsequently deleted once they are older than the pruning threshold set in the repository's Settings tab.
- D. Matching Images are untagged during the next prune job.
Answer: A
NEW QUESTION 31
Which one of the following commands will show a list of volumes for a specific container?
- A. 'docker volume logs nginx --containers'
- B. 'docker container logs nginx --volumes'
- C. 'docker container inspect nginx'
- D. 'docker volume inspect nginx'
Answer: C
NEW QUESTION 32
......
Latest DCA Exam Dumps Docker Exam: https://guidetorrent.dumpstorrent.com/DCA-exam-prep.html