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| Certification Vendor: | Docker |
|---|---|
| Exam Name: | Docker Certified Associate (DCA) Exam |
| Exam Number: | DCA |
| Exam Duration: | 90 minutes |
| Available Languages: | English |
| Exam Format: | Multiple select, Scenario-based questions, Performance-based tasks, Multiple choice |
| Exam Price: | USD 195 (approx.) |
| Real Exam Qty: | 55-60 (approx.) |
| Related Certifications: | Docker Certified Associate |
| Certificate Validity Period: | 2 years |
| Recommended Training: | Docker Official Training Courses Get Started with Docker Documentation |
| Exam Registration: | Docker Training & Exams Portal Docker Certification Official Page |
| Sample Questions: | Docker DCA Sample Questions |
| Exam Way: | Online proctored exam (remote) or authorized testing center depending on region |
| Pre Condition: | No formal prerequisites required; recommended 6-12 months of Docker/container experience |
| Official Syllabus URL: | https://www.docker.com/certification/ |
We have a team of experts curating the real DCA questions and answers for the end users. We are always working on updating the latest DCA questions and providing the correct DCA answers to all of our users. We provide free updates for one year from the date of purchase. You can benefit from the updates DCA Preparation material, and you will be able to pass the DCA exam in the first attempt.
To qualify for the Docker Certified Associate (DCA) exam, candidates must have a solid understanding of Docker technology and its various components. They should also be familiar with the Docker command line interface (CLI) and have experience working with Docker images, containers, and networks. Candidates can prepare for the exam by taking Docker training courses, reading the Docker documentation, and practicing with Docker technology on their own.
NEW QUESTION # 108
Does this describe the role of Control Groups (cgroups) when used with a Docker container?
Solution: accounting and limiting of resources
Answer: A
NEW QUESTION # 109
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: Set the log-driver and log-oPt keys to values for the logging solution (Splunk) In the daemon.json file.
Answer: B
Explanation:
Setting the log-driver and log-opt keys to values for the logging solution (Splunk) in the daemon.json file will configure a Docker container to export container logs to the logging solution. This is because the Splunk logging driver sends container logs to the HTTP Event Collector in Splunk Enterprise and Splunk Cloud1. To use the Splunk driver as the default logging driver, set the keys log-driver and log-opts to appropriate values in the daemon.json configuration file and restart Docker1. To use the Splunk driver for a specific container, use the commandline flags --log-driver and log-opt with docker run1. The Splunk logging driver supports various options, such as splunk-token, splunk-url, splunk-source, splunk-sourcetype, splunk-index, etc1. References:
Splunk logging driver | Docker Docs1
NEW QUESTION # 110
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 -constraint networking.protocol.udp=true dns-cache"
Answer: A
Explanation:
Explanation
This command does not create a swarm service that only listens on port 53 using the UDP protocol. The docker service create command creates a new service in a swarm cluster. The --name flag sets the name of the service. The -p or --publish flag publishes a port or a range of ports to the swarm. The --constraint flag applies a constraint to limit the set of nodes where the task can be scheduled. The networking.protocol.udp is not a valid constraint and will cause an error. To create a swarm service that only listens on port 53 using the UDP protocol, you need to use -p 53:53/udp instead. References:
https://docs.docker.com/engine/reference/commandline/service_create/,
https://docs.docker.com/engine/reference/commandline/service_create/#publish-service-ports-externally-to-the-s
https://docs.docker.com/engine/reference/commandline/service_create/#specify-service-constraints-constraint
NEW QUESTION # 111
Does this describe the role of Control Groups (cgroups) when used with a Docker container?
Solution: isolation between resources used by containers
Answer: B
Explanation:
Explanation
Control Groups (cgroups) are a Linux kernel feature that allow you to limit, modify, or allocate resources as needed1. Docker uses cgroups to isolate the resources used by containers, such as CPU, memory, disk I/O, network, etc2. This means that each container can have its own set of resource limits and constraints, and that the containers cannot interfere with each other or with the host system2. This improves the security, performance, and reliability of the containers and the system as a whole. References:
* Lab: Control Groups (cgroups) | dockerlabs
* Docker run reference | Docker Docs
NEW QUESTION # 112
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.
Answer: A
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 to the 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
Volumes), Use bind mounts)
NEW QUESTION # 113
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