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[General] Use Real Docker DCA Exam Questions [2026] To Gain Brilliant Result

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【General】 Use Real Docker DCA Exam Questions [2026] To Gain Brilliant Result

Posted at yesterday 21:18      View：9 | Replies：0        Print      Only Author   [Copy Link] 1#
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Docker Certified Associate (DCA) Exam Sample Questions (Q171-Q176):NEW QUESTION # 171
You want to create a container that is reachable from its host's network.
Does this action accomplish this?
Solution. Use network connect to access the container on the bridge network.
  • A. No
  • B. Yes
Answer: A
Explanation:
= Using network connect to access the container on the bridge network does not accomplish creating a container that is reachable from its host's network. The network connect command connects a container to an existing network, but it does not expose the container's ports to the host1. The bridge network is the default network that Docker creates for containers, and it provides isolation from the host network2. To create a container that is reachable from its host's network, you need to use the host network driver, which disables network isolation and uses the host's network stack directly3. Alternatively, you can use the port mapping feature to publish specific ports of the container to the host4. References:
* docker network connect | Docker Docs
* Bridge network driver | Docker Docs
* Host network driver | Docker Docs
* Publish ports on the host | Docker Docs

NEW QUESTION # 172
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: A
Explanation:
Explanation
The controller managing the pod is not autoscaled back to delete the unhealthy pod and alleviate load, because this is not how Kubernetes handles pod failures. According to the official documentation, Kubernetes will try to maintain the desired number of pods for each controller, and will not scale down or up based on pod health.
References:
https://kubernetes.io/docs/conce ... ationcontroller-wor

NEW QUESTION # 173
Is this statement correct?
Solution: A Dockerfile stores the Docker daemon's configuration options.
  • A. No
  • B. Yes
Answer: A
Explanation:
Explanation
The statement is not correct. A Dockerfile does not store the Docker daemon's configuration options. A Dockerfile is a text document that contains all the commands a user could call on the command line to assemble an image1. A Dockerfile is used to build images, not to configure the Docker daemon. The Docker daemon's configuration options are stored in a JSON file, which is usually located at /etc/docker/daemon.json on Linux systems, or CrogramDatadockerconfigdaemon.json on Windows2. The JSON file allows you to customize the Docker daemon's behavior, such as enabling debug mode, setting TLS certificates, or changing the data directory2. References: Dockerfile reference), Docker daemon configuration overview)

NEW QUESTION # 174
Will this command mount the host's '/data* directory to the ubuntu container in read-only mode?
Solution. 'docker run -add-volume /data /mydata -read-only ubuntu'
  • A. No
  • B. Yes
Answer: A
Explanation:
= The command docker run -add-volume /data /mydata -read-only ubuntu will not mount the host's /data directory to the ubuntu container in read-only mode. The reason is that the command has several syntax errors and invalid options. The correct command to mount a host directory to a container in read-only mode is docker run --mount type=bind,source=/data,target=/mydata,readonly ubuntu12. The command docker run -add-volume /data /mydata -read-only ubuntu has the following problems:
* The option -add-volume is not a valid option for docker run. The valid options for mounting a volume or a bind mount are --mount or -v12.
* The option -read-only is not a valid option for docker run. The valid option for making the container's root filesystem read-only is --read-only3. However, this option will not affect the mounted volumes or bind mounts, which have their own readonly option12.
* The argument /data /mydata is not a valid argument for docker run. The argument for docker run should be the command to run inside the container, such as bash or ping4. The source and target of the volume or bind mount should be specified in the --mount or -v option, separated by a colon12.
Therefore, the command docker run -add-volume /data /mydata -read-only ubuntu will not work as intended, and will likely produce an error message or an unexpected result. References:
* Use bind mounts
* Use volumes
* docker run
* Docker run reference

NEW QUESTION # 175
Is this a way to configure the Docker engine to use a registry without a trusted TLS certificate?
Solution. Set INSECURE_REGISTRY in the' /etc/docker/default' configuration file.
  • A. No
  • B. Yes
Answer: B
Explanation:
Explanation
Setting INSECURE_REGISTRY in the /etc/docker/default configuration file is a way to configure the Docker engine to use a registry without a trusted TLS certificate. The INSECURE_REGISTRY option allows you to specify one or more registries that do not have valid TLS certificates or use HTTP instead of HTTPS. This option bypasses the TLS verification for these registries and allows Docker to pull and push images from them without errors. However, this option is not recommended for production use as it exposes your registry communication to potential security risks. References: https://docs.docker.com/registry/insecure/,
https://docs.docker.com/engine/r ... insecure-registries

NEW QUESTION # 176
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