[2021] Pass Docker DCA Premium Files Test Engine pdf - Free Dumps Collection
New 2021 Realistic DCA Dumps Test Engine Exam Questions in here
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NEW QUESTION 50
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 during the next prune job, and subsequently deleted once they are older than the pruning threshold set in the repository's Settings tab.
- B. Matching images are untagged once they are older than the pruning threshold set in the repository's Settings tab.
- C. Matching images are deleted during the next prune Job.
- D. Matching Images are untagged during the next prune job.
Answer: B
NEW QUESTION 51
Will this configuration achieve fault tolerance for managers in a swarm?
Solution: an odd number of manager nodes, totaling more than two
- A. No
- B. Yes
Answer: B
NEW QUESTION 52
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 53
In the context of a swarm mode cluster, does this describe a node?
Solution: a physical machine participating in the swarm
- A. No
- B. Yes
Answer: A
NEW QUESTION 54
Is this a type of Linux kernel namespace that provides container isolation?
Solution: Network
- A. No
- B. Yes
Answer: A
NEW QUESTION 55
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 56
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 80 and forward to port 8080 in the container.
- B. Only a single node in the cluster will listen on port 80 and forward to port 8080 in the container.
- C. Only a single node in the cluster will listen on port 8080 and forward to port 80 in the
container. - D. All nodes in the cluster will listen on port 8080 and forward to port 80 in the container.
Answer: D
NEW QUESTION 57
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 58
Is this an advantage of multi-stage builds?
Solution: optimizes Images by copying artifacts selectively from previous stages
- A. No
- B. Yes
Answer: B
NEW QUESTION 59
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 updates the number of replicas of the 'web' service to 3. Alice's command results in an error.
- 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 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 60
During development of an application meant to be orchestrated by Kubernetes, you want to mount the /data directory on your laptop into a container.
Will this strategy successfully accomplish this?
Solution: Add a volume to the pod that sets hostPath.path: /data, and then mount this volume into the pod's containers as desired.
- A. No
- B. Yes
Answer: A
NEW QUESTION 61
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 62
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 ps http'
- C. 'docker service inspect http'
- D. 'docker service ps http'
Answer: D
NEW QUESTION 63
Which statement is true?
- A. ENTRYPOINT cannot be overriden in the "docker container run" command
- B. ENTRYPOINT cannot be used in conjuction with CMD
- C. CMD is used to run the software is the image along with any arguments
- D. CMD shell format uses this form ["param", param", "param"]
Answer: D
NEW QUESTION 64
In the context of a swarm mode cluster, does this describe a node?
Solution: an instance of the Docker engine participating in the swarm
- A. No
- B. Yes
Answer: B
NEW QUESTION 65
When seven managers are in a swarm cluster how would they be distributed across three datacenters or availability zones?
- A. 4-2-1
- B. 5-1-1
- C. 3-3-1
- D. 3-2-2
Answer: A
NEW QUESTION 66
You want to create a container that is reachable from its host's network. Does this action accomplish this?
Solution: Use network attach to access the containers on the bridge network
- A. No
- B. Yes
Answer: A
NEW QUESTION 67
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