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Get Excellent Marks in One Go with Docker DCA Real PDF Dumps

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For the Docker Certified Associate (DCA) Exam (DCA) web-based practice exam no special software installation is required. Because it is a browser-based Docker Certified Associate (DCA) Exam (DCA) practice test. The web-based Docker Certified Associate (DCA) Exam (DCA) practice exam works on all operating systems like Mac, Linux, iOS, Android, and Windows.

The DCA certification exam is a challenging exam that requires candidates to have a deep understanding of Docker and its ecosystem. Candidates must be able to perform tasks such as creating Docker images, deploying containers, configuring networking, and troubleshooting issues. DCA Exam also covers advanced topics such as Docker Swarm, Kubernetes, and Docker Enterprise Edition.

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Docker Certified Associate (DCA) Exam Sample Questions (Q101-Q106):

NEW QUESTION # 101
Will this configuration achieve fault tolerance for managers in a swarm?
Solution: one manager node for two worker nodes

A. Yes
B. No

Answer: B

Explanation:
Docker Swarm requires more than one manager node to achieve fault tolerance12. A single manager node is not fault tolerant because if it goes down, the entire cluster goes down3. For a swarm to be fault-tolerant, it needs to have an odd number of manager nodes2. For example, a three-manager swarm tolerates a maximum loss of one manager2. Therefore, a configuration with one manager node for two worker nodes will not achieve fault tolerance for managers in a swarm12.

NEW QUESTION # 102
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. Yes
B. No

Answer: A

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 # 103
Will this command list all nodes in a swarm cluster from the command line?
Solution: 'docker Is -a'

A. Yes
B. No

Answer: B

Explanation:
The command docker Is -a does not list all nodes in a swarm cluster from the command line, but rather lists all containers, both running and stopped, on the current node1. To list all nodes in a swarm cluster, you need to use the command docker node ls from a manager node2. This command shows the node ID, hostname, status, availability, and manager status for each nodein the swarm2. You can also use the --filter option to filter the output based on various criteria2. Reference: Docker Documentation, docker node ls

NEW QUESTION # 104
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. Yes
B. No

Answer: A

Explanation:
Explanation
Provisioning a Docker config object for each environment is a way to provision configuration to containers at runtime. A Docker config object is a file that contains configuration data for an application or service. It can be created using the docker config create command and then attached to a service using the --config flag of the docker service create or update command. This allows different configurations to be applied to different environments without changing the image or the code of the application. References:
https://docs.docker.com/engine/swarm/configs/,
https://docs.docker.com/engine/reference/commandline/config_create/

NEW QUESTION # 105
Does this command create a swarm service that only listens on port 53 using the UDP protocol?
Solution: 'docker service create --name dns-cache -p 53:53/udp dns-cache'

A. Yes
B. No

Answer: A

Explanation:
= The command 'docker service create --name dns-cache -p 53:53/udp dns-cache' creates a swarm service that only listens on port 53 using the UDP protocol. This is because the -p flag specifies the port mapping between the host and the service, and the /udp suffix indicates the protocol to use1. Port 53 is commonly used for DNS services, which use UDP as the default transport protocol2. The dns-cache argument is the name of the image to use for the service.
:
docker service create | Docker Documentation
DNS - Wikipedia
I hope this helps you understand the command and the protocol, and how they work with Docker and swarm. If you have any other questions related to Docker, please feel free to ask me.

NEW QUESTION # 106
......

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