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Docker DCA Dumps

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Docker Certified Associate (DCA) Exam
Last Update: May 24, 2023
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Docker Certified Associate (DCA) Exam Questions and Answers

Questions 1

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.






Questions 2

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.






Questions 3

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?



Bob's command results in an error. Alice's command updates the number of replicas of the 'web' service to 3.


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.


Bob's command updates the number of replicas of the 'web' service to 3. Alice's command results in an error.


Both Bob's and Alice's commands result in exactly the same outcome, which is 3 instances of the 'web' service.

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