SIMULATE THE REAL EXAM WITH DOCKER DCA PRACTICE EXAMS

Simulate the Real Exam with Docker DCA Practice Exams

Simulate the Real Exam with Docker DCA Practice Exams

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Docker Certified Associate (DCA) Exam Sample Questions (Q43-Q48):

NEW QUESTION # 43
Is this statement correct?
Solution: A Dockerfile provides instructions for building a Docker image

  • A. No
  • B. Yes

Answer: B

Explanation:
Explanation
This statement is correct. A Dockerfile provides instructions for building a Docker image. A Dockerfile is a text document that contains all the commands a user could call on the command line to assemble an image.
Using docker build, you can create an automated build that executes several command-line instructions in succession. References: https://docs.docker.com/engine/reference/builder/,
https://docs.docker.com/engine/reference/commandline/build/


NEW QUESTION # 44
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

Explanation:
The command docker inspect http will not enable you to view the list of historical tasks for the service. The docker inspect command returns low-level information on Docker objects, such as containers, images, networks, or volumes1. It does not work on services, which are higher-level objects that define the desired state of a set of tasks2. To view the list of historical tasks for a service, you need to use the docker service ps command, which shows the current and previous states of each task, as well as the node, error, and ports3. References:
* docker inspect | Docker Docs
* Services | Docker Docs
* docker service ps | Docker Docs


NEW QUESTION # 45
A persistentVolumeClaim (PVC) is created with the specification storageClass: "", and size requirements that cannot be satisfied by any existing persistentVolume.
Is this an action Kubernetes takes in this situation?
Solution: The PVC remains unbound until a persistentVolume that matches all requirements of the PVC becomes available.

  • A. No
  • B. Yes

Answer: B

Explanation:
= A persistentVolumeClaim (PVC) is a request for storage by a user. It is similar to a Pod. Pods consume node resources and PVCs consume PV resources1. A PVC can specify a storage class, which is a way of requesting a certain quality of service for the volume2. If the storage class is empty, it means the PVC does not have any specific storage class requirements and can be bound to any PV that satisfies its size and access mode3.
However, if there is no existing PV that matches the PVC's requirements, the PVC remains unbound until a suitable PV becomes available. This can happen either by manual provisioning by an administrator or by dynamic provisioning using StorageClasses1. References:
* Persistent Volumes | Kubernetes
* Storage Classes | Kubernetes
* Configure a Pod to Use a PersistentVolume for Storage | Kubernetes


NEW QUESTION # 46
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 --mount=app1 app2
  • B. docker run -d --name=reports --volumes-from=analytics app2
  • C. docker run -d --name=reports --volume=data app2
  • D. docker run -d --name=reports --volume=app1 app2

Answer: B


NEW QUESTION # 47
Is this a way to configure the Docker engine to use a registry without a trusted TLS certificate?
Solution. Set and export the IGNORE_TLS environment variable on the command line.

  • A. No
  • B. Yes

Answer: A

Explanation:
= Setting and exporting the IGNORE_TLS environment variable on the command line is not a way to configure the Docker engine to use a registry without a trusted TLS certificate. This environment variable is not recognized by Docker and has no effect on the TLS verification process1. To use a registry without a trusted TLS certificate, you need to either add the certificate to the system or Docker-specific trust store, or configure the Docker daemon to allow insecure registries23. References:
* Environment variables | Docker Docs
* Verify repository client with certificates | Docker Docs
* Test an insecure registry | Docker Docs


NEW QUESTION # 48
......

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