Docker DCA Exam Dumps

Docker Certified Associate (DCA) Exam

533 Reviews

Exam Code	DCA
Exam Name	Docker Certified Associate (DCA) Exam
Questions	191 Questions Answers With Explanation
Update Date	06, 30, 2026
Price	Was : $81 Today : $45 Was : $99 Today : $55 Was : $117 Today : $65

Add To Cart

Demo Questions

Question # 1

You have just executed 'docker swarm leave' on a node. What command can be run on the same node to confirm it has left the cluster?

A. docker node ls
B. docker system info
C. docker system status
D. docker system status

Show Answer

Question # 2

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. Yes
B. Yes

Show Answer

Question # 3

Is this a function of UCP? Solution: image role-based access control

A. Yes
B. No

Show Answer

Question # 4

Is this a Linux kernel namespace that is disabled by default and must be enabled at Docker engine runtime to be used? Solution: net

A. Yes
B. No

Show Answer

Question # 5

Which networking drivers allow you to enable multi-host network connectivity between containers? 

A. macvlan, ipvlan, and overlay
B. bridge, user-defined, host
C. bridge, macvlan, ipvlan, overlay
D. host, macvlan, overlay, user-defined

Show Answer

Question # 6

What behavior is expected when a service is created with the following command: 'docker service create --publish 8000:80 nginx' 

A. All nodes in the cluster will listen on port 8080 and forward to port 80 in the container.
B. Only a single node in the cluster will listen on port 8080 and forward to port 80 in the container.
C. All nodes in the cluster will listen on port 80 and forward to port 8080 in the container.
D. Only a single node in the cluster will listen on port 80 and forward to port 8080 in the container.

Show Answer

Question # 7

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. UCP audit logs must be set to the metadata' or request' level.
B. UCP logging levels must be set to the info' or debug' level.
C. All engines in the cluster must have their log driver set to the metadata' or request' level.
D. Set the logging level in theconfig object for the ucp-kube-api-server container to warning or higher.

Show Answer

Question # 8

Which of the following commands starts a Redis container and configures it to always restart unless it is explicitly stopped or Docker is restarted?

A. 'docker run -d --restart-policy unless-stopped redis'
B. 'docker run -d --restart omit-stopped redis'
C. 'docker run -d --restart unless-stopped redis'
D. 'docker run -d --failure omit-stopped redis'

Show Answer

Question # 9

A docker service 'web' is running with a scale factor of 1 (replicas = 1). Bob intends to use the command 'docker service update --replicas=3 web'. Alice intends to use the command 'docker service scale web=3'. How do the outcomes oft these two commands differ?

A. Bob's command results in an error. Alice's command updates the number of replicas of the 'web' service to 3.
B. Bob's command only updates the service definition, but no new replicas are started. Alice's command results in the actual scaling up of the 'web' service.
C. Bob's command updates the number of replicas of the 'web' service to 3. Alice's command results in an error.
D. Both Bob's and Alice's commands result in exactly the same outcome, which is 3 instances of the 'web' service.

Show Answer

Question # 10

Will this action upgrade Docker Engine CE to Docker Engine EE? Solution: Delete '/var/lib/docker' directory. 

A. Yes
B. No

Show Answer

Question # 11

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

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'

Show Answer

Question # 12

Will this command mount the host's '/data' directory to the ubuntu container in read-only mode? Solution: 'docker run -v /data:/mydata --mode readonly ubuntu'

A. Yes
B. No

Show Answer

Question # 13

How do you change the default logging driver for the docker daemon in Linux?

A. Set the value of log-driver to the name of the logging driver In the daemon.json In /etc/doc
B. Use the -log-driver' flag when you run a container.
C. At the command line, type: docker log driver set <driver name>
D. Install a logging agent on the Linux host.

Show Answer

Question # 14

Will this command list all nodes in a swarm cluster from the command line? Solution: ‘docker Is -a’ 

A. Yes
B. No

Show Answer

Question # 15

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 untagged during the next prune job.
C. Matching images are deleted during the next prune Job.
D. 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.

Show Answer

Question # 16

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

Show Answer

Question # 17

Which of the following commands will create a swarm service which only listens on port 53 using the UDP protocol?

A. docker service create --name dns-cache -p 53:53/udp dns-cache
B. docker service create --name dns-cache -p 53:53 --service udp dns-cache
C. docker service create --name dns-cache -p 53:53 ..constraintnetworking.protocol.udp=true dns-cache 
D. docker service create --name dns-cache -p 53:53 --udp dns-cache

Show Answer

Question # 18

Is this the purpose of Docker Content Trust? Solution: Verify and encrypt Docker registry TLS.

A. Yes
B. No

Show Answer

Question # 19

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. Yes
B. No

Show Answer

Question # 20

Does this command display all the pods in the cluster that are labeled as 'env: development'? Solution: 'kubectl get pods --all-namespaces -I env=development' 

A. Yes
B. No

Show Answer

Question # 21

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

A. Create a volume group in devicemapper and utilize the '--dm.thinpooldev' Docker daemon option, specifying the volume group
B. Format a partition with xfs and mount it at '/var/lib/docker'
C. Utilize the '--storage-opt dm.directlvm_device' Docker daemon option, specifying a block device
D. Nothing, devicemapper comes ready for production usage out of the box

Show Answer

Question # 22

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: Set the log-driver and log-oPt keys to values for the logging solution (Splunk) In the daemon.json file.

A. Yes
B. No

Show Answer

Question # 23

Which one of the following commands will result in the volume being removed automatically once the container has exited?

A. 'docker run --del -v /foo busybox'
B. 'docker run --read-only -v /foo busybox'
C. 'docker run --rm -v /foo busybox'
D. 'docker run --remove -v /foo busybox'

Show Answer

Question # 24

Will this command list all nodes in a swarm cluster from the command line? Solution: 'docker swarm nodes' 

A. Yes
B. No

Show Answer

Question # 25

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. at the bottom of the Dockerfile
B. after the FROM directive
C. at the top of the Dockerfile
D. in the ENTRYPOINT directive

Show Answer