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Docker Certified Associate (DCA) Certification Exam is a globally recognized certification program that validates the technical knowledge and skills required of Docker practitioners. Docker Certified Associate (DCA) Exam certification is offered by Docker, the popular containerization platform that enables developers to build, ship, and run containerized applications quickly and efficiently. The DCA Certification Exam is designed to test the knowledge and practical skills of Docker practitioners and managers to enable them to effectively work with and manage containerized applications.

The DCA certification exam is an objective, online-based exam that tests an individual's knowledge and practical skills in various Docker areas. DCA exam consists of 55 multiple choice and multiple select questions with a time limit of 90 minutes to complete. DCA exam is designed to be challenging and requires significant preparation before taking it. Candidates must score a minimum of 65% to pass the exam and earn the DCA certification. Docker Certified Associate (DCA) Exam certification is valid for two years and then must be renewed.

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Docker Certified Associate (DCA) Exam Sample Questions (Q100-Q105):

NEW QUESTION # 100
Will this action upgrade Docker Engine CE to Docker Engine EE?
Solution: Manually download the 'docker-ee' package

A. Yes
B. No

Answer: A

NEW QUESTION # 101
Does this describe the role of Control Groups (cgroups) when used with a Docker container?
Solution: user authorization to the Docker API

A. Yes
B. No

Answer: B

Explanation:
Explanation
This does not describe the role of Control Groups (cgroups) when used with a Docker container, because user authorization to the Docker API is not related to cgroups. According to the official documentation, cgroups are a Linux kernel feature that limits and isolates the resource usage of a group of processes, such as CPU, memory, disk I/O, network, etc. Docker can use cgroups to share available hardware resources to containers and optionally enforce limits and constraints.
References: https://docs.docker.com/config/containers/runmetrics/
https://bikramat.medium.com/namespace-vs-cgroup-60c832c6b8c8

NEW QUESTION # 102
Can this set of commands identify the published port(s) for a container?
Solution: docker container inspect', 'docker port'

A. Yes
B. No

Answer: A

Explanation:
The set of commands docker container inspect and docker port can identify the published port(s) for a container. The docker container inspect command returns low-level information about a container, including its network settings and port bindings1. The docker port command lists port mappings or a specific mapping for the container2. Both commands can show which host port is mapped to which container port, and the protocol used. For example, docker container inspect -f '{{.NetworkSettings.Ports}}' container_name will show the port bindings for the container_name3. Similarly, docker port container_name will show the port mappings for the container_name. Reference:
docker container inspect
docker port
How to Expose and Publish Ports in Docker
[How to obtain the published ports from within a docker container?]

NEW QUESTION # 103
The output of which command can be used to find the architecture and operating system an image is
compatible with?

A. docker image info <image-id>
B. docker image inspect --filter {{.Architecture}} {{.OS}} ' <image-id>
C. docker image ls <image-id>
D. docker image inspect --format {{.Architecture}} {{.OS}} ' <image-id>

Answer: D

NEW QUESTION # 104
Does this describe the role of Control Groups (cgroups) when used with a Docker container?
Solution: accounting and limiting of resources

A. Yes
B. No

Answer: A

Explanation:
Explanation
= Control Groups (cgroups) are a feature of the Linux kernel that allow you to limit the access processes and containers have to system resources such as CPU, memory, disk I/O, network, and so on1. Control groups allow Docker Engine to share available hardware resources to containers and optionally enforce limits and constraints2. For example, you can use the docker run command to specify the CPU shares, memory limit, or network bandwidth for a container3. By using cgroups, you can ensure that each container gets the resources it needs and prevent resource starvation or overcommitment4. References:
* Lab: Control Groups (cgroups) | dockerlabs
* Runtime metrics | Docker Docs
* Docker run reference | Docker Docs
* Docker resource management via Cgroups and systemd

NEW QUESTION # 105
......

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