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  1. Home
  2. Docker Certification
  3. DCA Exam
  4. Docker.DCA.v2025-07-01.q110 Dumps
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Question 1

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.

Correct Answer: B
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. The IGNORE_TLS environment variable is not recognized by Docker and has no effect on its behavior. To configure the Docker engine to use a registry without a trusted TLS certificate, you need to either set INSECURE_REGISTRY in the /etc/docker/default configuration file or add --insecure-registry flag to the dockerd command. References:
https://docs.docker.com/registry/insecure/,
https://docs.docker.com/engine/reference/commandline/dockerd/#insecure-registries
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Question 2

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 service ps http'

Correct Answer: A
= The command 'docker service ps http' will list the tasks that are running as part of the 'http' service, as well as the task history1. The task history shows the previous states of the tasks, such as running, shutdown, rejected, etc. This can help you troubleshoot why the service is not registering as healthy, by looking at the current state, error, and ports of each task1. Reference:
docker service ps | Docker Docs
Docker Certified Associate Guide
DCA Prep Guide
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Question 3

Will this command display a list of volumes for a specific container?
Solution: 'docker container inspect nginx'

Correct Answer: A
= The command docker container inspect nginx will display a list of volumes for the specific container named nginx. The output of the command will include a section called "Mounts" that shows the source, destination, mode, type, and propagation of each volume mounted in the container1. For example, the following output shows that the container nginx has two volumes: one is a bind mount from the host's /var/log/nginx directory to the container's /var/log/nginx directory, and the other is an anonymous volume created by Docker at /var/lib/docker/volumes/... and mounted to the container's /etc/nginx/conf.d directory2.
"Mounts": [
{
"Type": "bind",
"Source": "/var/log/nginx",
"Destination": "/var/log/nginx",
"Mode": "rw",
"RW": true,
"Propagation": "rprivate"
},
{
"Type": "volume",
"Name": "f6eb3dfdd57b7e632f6329a6d9bce75a1e8ffdf94498e5309c6c81a87832c28d",
"Source": "/var/lib/docker/volumes/f6eb3dfdd57b7e632f6329a6d9bce75a1e8ffdf94498e5309c6c81a87832c28d/_data",
"Destination": "/etc/nginx/conf.d",
"Driver": "local",
"Mode": "",
"RW": true,
"Propagation": ""
}
]
:
docker container inspect
List volumes of Docker container
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Question 4

Which of the following modes can be used for service discovery of a Docker swarm service (Pick 2 correct answers)

Correct Answer: A,B
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Question 5

Will a DTR security scan detect this?
Solution: known vulnerabilities or exposures in binaries

Correct Answer: A
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