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Develop Your Abilities and Obtain Docker DCA Certification Without Difficulty

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Docker Certified Associate (DCA) exam is a certification program designed to validate an individual's skills in using Docker technology. DCA exam is administered by Docker, Inc., the company responsible for developing and maintaining the Docker platform. The DCA certification is globally recognized and demonstrates the holder's ability to work with Docker in a professional setting.

Docker DCA (Docker Certified Associate) is a certification exam that is designed to test the skills and knowledge of Docker professionals. Docker Certified Associate (DCA) Exam certification exam is offered by Docker, Inc. and is intended for individuals who work with Docker on a regular basis. DCA Exam covers topics such as Docker installation and configuration, Docker networking, Docker security, and more.

Docker Certified Associate (DCA) Exam Sample Questions (Q33-Q38):

NEW QUESTION # 33
In the context of a swarm mode cluster, does this describe a node?
Solution: an instance of the Docker engine participating in the swarm

A. Yes
B. No

Answer: A

NEW QUESTION # 34
You add a new user to the engineering organization in DTR.
Will this action grant them read/write access to the engineering/api repository?
Solution: Add the user directly to the list of users with read/write access under the repository's Permissions tab.

A. Yes
B. No

Answer: A

NEW QUESTION # 35
During development of an application meant to be orchestrated by Kubernetes, you want to mount the /data directory on your laptop into a container.
Will this strategy successfully accomplish this?
Solution. Set containers. Mounts. hostBinding: /data in the container's specification.

A. Yes
B. No

Answer: B

Explanation:
Explanation
The strategy will not successfully accomplish mounting the /data directory on your laptop into a container.
The containers. Mounts. hostBinding: /data is not a valid syntax for specifying a bind mount in a Kubernetes container specification. According tothe Kubernetes documentation), the correct way to mount a host directory into a container is to use a hostPath volume, which takes a path parameter that specifies the location on the host. For example, to mount the /data directory on your laptop into a container at /var/data, you can use the following YAML snippet:
spec:
containers:
-name:my-container
image:my-image
volumeMounts:
-name:data-volume
mountPath:/var/data
volumes:
-name:data-volume
hostPath:
path:/data
References: Volumes), Use bind mounts)

NEW QUESTION # 36
Will this Linux kernel facility limit a Docker container's access to host resources, such as CPU or memory?
Solution: seccomp

A. Yes
B. No

Answer: A

Explanation:
Explanation
= Seccomp is a Linux kernel feature that allows you to restrict the actions available within the container. By using a seccomp profile, you can limit the system calls that a container can make, thus enhancing its security and isolation. Docker has a default seccomp profile that blocks some potentially dangerous system calls, such as mount, reboot, or ptrace. You can also pass a custom seccomp profile for a container using the --security-opt option. Seccomp can limit a container's access to host resources, such as CPU or memory, by blocking or filtering system calls that affect those resources, such as setpriority, sched_setaffinity, or mlock. References:
* Seccomp security profiles for Docker
* Hardening Docker Container Using Seccomp Security Profile

NEW QUESTION # 37
The following Docker Compose file is deployed as a stack:

Is this statement correct about this health check definition?
Solution. Health checks lest for app health ten seconds apart. Three failed health checks transition the container into "unhealthy" status.

A. Yes
B. No

Answer: A

Explanation:
The statement is correct. In the provided Docker Compose file, a health check is defined for the service "app".
It uses curl to perform a health check on the application every 10 seconds (as specified by the "interval" parameter). If it fails three times (as specified by the "retries" parameter), then the container is marked as unhealthy. A health check is a way of checking the health of a running container and applying actions based on the result1. It can be used to monitor the status of the service and restart the container if it becomes unhealthy2. References:
* Compose file version 3 reference | Docker Docs
* Docker Compose & Health Checks - Gabriel's World

NEW QUESTION # 38
......

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