FREE PDF 2025 DOCKER MARVELOUS NEW DCA MOCK TEST

Free PDF 2025 Docker Marvelous New DCA Mock Test

Free PDF 2025 Docker Marvelous New DCA Mock Test

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Docker Certified Associate (DCA) Exam Sample Questions (Q12-Q17):

NEW QUESTION # 12
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 run -- log driver=splunk for every container at run time

  • A. No
  • B. Yes

Answer: B

Explanation:
The command docker run --log-driver=splunk for every container at run time will configure a Docker container to export container logs to the logging solution. The reason is that the --log-driver option specifies the logging driver for the container, which determines how the container logs are handled1. The splunk logging driver is a plugin that sends container logs to HTTP Event Collector in Splunk Enterprise and Splunk Cloud2. To use the splunk logging driver, you also need to provide some additional options with the --log-opt flag, such as the Splunk token, URL, source, sourcetype, index, etc2. For example, to run a container with the splunk logging driver and send the logs to a Splunk instance with the URL https://splunk.example.com:8088 and the token 176fabb6-7811-4b3a-8ba0-4d49302e50f2, you can use:
docker run --log-driver=splunk --log-opt splunk-token=176fabb6-7811-4b3a-8ba0-4d49302e50f2 --log-opt splunk-url=https://splunk.example.com:8088 ...
This way, you can configure a Docker container to export container logs to Splunk, which is a centralized logging solution. Alternatively, you can also configure the splunk logging driver as the default logging driver for the Docker daemon by setting the log-driver and log-opts keys in the daemon.json file and restarting Docker3. Thiswill apply the splunk logging driver to all containers unless overridden by the --log-driver option. Reference:
Configure logging drivers
Splunk logging driver
Set the logging driver for the Docker daemon


NEW QUESTION # 13
Is this a Linux kernel namespace that is disabled by default and must be enabled at Docker engine runtime to be used?
Solution.pid

  • A. No
  • B. Yes

Answer: A

Explanation:
= The pid namespace is not a Linux kernel namespace that is disabled by default and must be enabled at Docker engine runtime to be used. The pid namespace is one of the six namespaces that are enabled by default when you run a container with Docker1. The pid namespace isolates the process ID number space, meaning that processes in different pid namespaces can have the same PID2. This allows containers to have their own init process with PID 1 and to limit the visibility and interaction of processes between containers and the host3. To disable the pid namespace, you need to use the --pid option with the docker run command and specify the host or another container as the pid mode. Reference:
Docker run reference | Docker Docs
pid_namespaces(7) - Linux manual page - man7.org
Building containers by hand: The PID namespace - Enable Sysadmin
[Share host and container processes with --pid | Docker Docs]


NEW QUESTION # 14
A users attempts to set the system time from inside a Docker container are unsuccessful. Could this be blocking this operation?
Solution: inter-process communication

  • A. No
  • B. Yes

Answer: A

Explanation:
Explanation
(Please check the official Docker site for the verified answer) Comprehensive Explanation: = (Please check the official Docker site for the comprehensive explanation) References: (Some possible references from the web search results are)
* Docker Security - Docker Documentation
* Docker Security Best Practices - Medium
* Docker Security Cheat Sheet - GitHub
* Docker Security: A Comprehensive Guide - Snyk
* Docker Security: Tips and Tricks to Secure Your Containers - DevSecOps I hope this helps you in your exam preparation. Good luck!


NEW QUESTION # 15
What is the docker command to setup a swarm?

  • A. docker swarm init
  • B. docker swarm create
  • C. docker create swarm
  • D. docker init swarm

Answer: A

Explanation:
Explanation
https://docs.docker.com/engine/reference/commandline/swarm/


NEW QUESTION # 16
An application image runs in multiple environments, with each environment using different certificates and ports.
Is this a way to provision configuration to containers at runtime?
Solution: Provision a Docker config object for each environment.

  • A. No
  • B. Yes

Answer: B

Explanation:
= Provisioning a Docker config object for each environment is a way to provision configuration to containers at runtime. Docker configs allow services to adapt their behaviour without the need to rebuild a Docker image. Services can only access configs when explicitly granted by a configs attribute within the services top-level element. As with volumes, configs are mounted as files into a service's container's filesystem1. Docker configs are supported on both Linux and Windows services2. Reference: Docker Documentation, Configs top-level element


NEW QUESTION # 17
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