[Oct-2021] Download Real Docker DCA Exam Dumps Test Engine Exam Questions
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NEW QUESTION 11
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 12
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"?
- A. docker run -d --name=reports --volume=data app2
- B. docker run -d --name=reports --volume=app1 app2
- C. docker run -d --name=reports --mount=app1 app2
- D. docker run -d --name=reports --volumes-from=analytics app2
Answer: D
NEW QUESTION 13
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. No
- B. Yes
Answer: B
NEW QUESTION 14
Seven managers are in a swarm cluster.
Is this how should they be distributed across three datacenters or availability zones?
Solution: 3-3-1
- A. No
- B. Yes
Answer: A
NEW QUESTION 15
Is this a type of Linux kernel namespace that provides container isolation?
Solution: Authentication
- A. No
- B. Yes
Answer: B
NEW QUESTION 16
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 only updates the service definition, but no new replicas are started. Alice's command
results in the actual scaling up of the 'web' service. - B. Bob's command updates the number of replicas of the 'web' service to 3. Alice's command results in an error.
- C. Bob's command results in an error. Alice's command updates the number of replicas of the 'web' service to 3.
- D. Both Bob's and Alice's commands result in exactly the same outcome, which is 3 instances of the 'web' service.
Answer: D
NEW QUESTION 17
Is this a supported user authentication method for Universal Control Plane?
Solution: PAM
- A. No
- B. Yes
Answer: A
NEW QUESTION 18
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: Kubernetes automatically triggers a user-defined script to attempt to fix the unhealthy container.
- A. No
- B. Yes
Answer: A
NEW QUESTION 19
Which one of the following commands will result in the volume being removed automatically once the container has exited?
- A. 'docker run --rm -v /foo busybox'
- B. 'docker run --del -v /foo busybox'
- C. 'docker run --read-only -v /foo busybox'
- D. 'docker run --remove -v /foo busybox'
Answer: A
NEW QUESTION 20
Which of the following statements is true about secrets?
- A. Secrets can be created using standard input (STDIN) and a file.
- B. Secrets can be modified after they are created.
- C. Secrets can be created from any node in the cluster.
- D. Secret are stored unencrypted on manager nodes.
Answer: A
NEW QUESTION 21
In Docker Trusted Registry, how would a user prevent an image, for example 'nginx:latest' from being
overwritten by another user with push access to the repository?
- A. Use the DTR web UI to make the tag immutable.
- B. Tag the image with 'nginx:immutable'
- C. Keep a backup copy of the image on another repository.
- D. Remove push access from all other users.
Answer: A
NEW QUESTION 22
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 logging levels must be set to the info' or debug' level.
- B. UCP audit logs must be set to the metadata' or request' 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.
Answer: B
NEW QUESTION 23
Which statement is correct about cluster management in Docker Enterprise Edition 3.x?
- A. Clusters can contain Windows 10 and Windows Server 2016 only.
- B. Clusters can contain Linux, Windows Server 2016 and 2019, and Linux on IBM z Systems.
- C. Clusters can contain Linux only.
- D. Clusters can contain Linux and Windows Server 2008 R2 only.
Answer: A
NEW QUESTION 24
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 logs <container-id>
- A. No
- B. Yes
Answer: A
NEW QUESTION 25
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 26
Which networking drivers allow you to enable multi-host network connectivity between containers?
- A. macvlan, ipvlan, and overlay
- B. bridge, macvlan, ipvlan, overlay
- C. bridge, user-defined, host
- D. host, macvlan, overlay, user-defined
Answer: A
NEW QUESTION 27
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 controller managing the pod is autoscaled back to delete the unhealthy pod and alleviate load.
- A. No
- B. Yes
Answer: B
NEW QUESTION 28
Which of the following is true about overlay networks?
- A. Overlay networks are only created on the manager nodes.
- B. Overlay networks are created only on the manager node that you created the overlay networking on
- C. 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.
- D. Overlay networks are created on all cluster nodes when you create the overlay network.
Answer: D
Explanation:
Explanation
NEW QUESTION 29
Is this a way to configure the Docker engine to use a registry without a trusted TLS certificate?
Solution: Pass the '--insecure-registry' flag to the daemon at run time.
- A. No
- B. Yes
Answer: B
NEW QUESTION 30
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 31
You have deployed a service to swarm. Which command uses the Docker CLI to set the number of tasks of the services to 5? (choose 2)
- A. 'docker service replicas <service-id>=5'
- B. 'docker update service <service-id>=5'
- C. 'docker service scale <service-id> = 5''
- D. 'docker replica update <service-id>=5'
- E. 'docker service update --replicas=5 <service-id>'
Answer: C,E
NEW QUESTION 32
Seven managers are in a swarm cluster.
Is this how should they be distributed across three datacenters or availability zones?
Solution: 5-1-1
- A. No
- B. Yes
Answer: A
NEW QUESTION 33
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. No
- B. Yes
Answer: B
NEW QUESTION 34
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. No
- B. Yes
Answer: B
NEW QUESTION 35
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