100% PASS QUIZ 2025 PERFECT DOCKER DCA: DOCKER CERTIFIED ASSOCIATE (DCA) EXAM BOOKS PDF

100% Pass Quiz 2025 Perfect Docker DCA: Docker Certified Associate (DCA) Exam Books PDF

100% Pass Quiz 2025 Perfect Docker DCA: Docker Certified Associate (DCA) Exam Books PDF

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Introduction to Docker Certified Associate Exam

Docker Certified Associate (DCA) certification serves as a foundational benchmark for real-world container technology expertise with Docker Enterprise Edition. Candidates for DCA Exam are seeking to prove fundamental Docker containerization technology knowledge and skills. Before taking this exam, exam aspirants ought to have a solid fundamental information of the concepts shared in the preparation guide as well as on containerization.

It is suggested that professionals accustomed to the ideas and also the technologies represented here by taking relevant training courses. Candidates are expected to have a strong understanding of core docker services, docker images, docker container, and their cmdlets.After passing this exam, candidates get a certificate from Docker that helps them to demonstrate their proficiency in Docker containerization technology to their clients and employers.

Docker Certified Associate (DCA) exam is a certification program designed to validate the skills and knowledge of professionals who use Docker technologies. It is an industry-recognized certification that demonstrates a candidate's ability to work with Docker environments and understand the underlying concepts of containerization. The DCA Exam is a globally recognized certification that is highly sought after by IT professionals and organizations.

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Docker Certified Associate (DCA) Exam Sample Questions (Q175-Q180):

NEW QUESTION # 175
Is this the purpose of Docker Content Trust?
Solution.Sign and verify image tags.

  • A. Yes
  • B. No

Answer: A

Explanation:
= The purpose of Docker Content Trust is to sign and verify image tags using digital signatures for data sent to and received from remote Docker registries12. This allows client-side or runtime verification of the integrity and publisher of specific image tags, ensuring the provenance and security of container images34. Reference:
1: Content trust in Docker | Docker Docs
2: Docker Content Trust: What It Is and How It Secures Container Images
3: Docker Content Trust in Azure Pipelines - Azure Pipelines
4: 4.5 Ensure Content trust for Docker is Enabled | Tenable


NEW QUESTION # 176
Which docker run` flag lifts cgroup limitations?

  • A. `docker run -isolation
  • B. `docker run -cap-drop
  • C. `docker run -cpu-period
  • D. `docker run -privileged

Answer: D

Explanation:
Explanation
The --privileged flag lifts all the cgroup limitations for a container, as well as other security restrictions imposed by the Docker daemon1. This gives the container full access to the host's devices, resources, and capabilities, as if it was running directly on the host2. This can be useful for certain use cases that require elevated privileges, such as running Docker-in-Docker or debugging system issues3. However, using the
--privileged flag also poses a security risk, as it exposes the host to potential attacks or damages from the container4. Therefore, it is not recommended to use the --privileged flag unless absolutely necessary, and only with trusted images and containers.
The other options are not correct because they do not lift all the cgroup limitations for a container, but only affect specific aspects of the container's resource allocation or isolation:
*The --cpu-period flag sets the CPU CFS (Completely Fair Scheduler) period for a container, which is the length of a CPU cycle in microseconds. This flag can be used in conjunction with the --cpu-quota flag to limit the CPU time allocated to a container. However, this flag does not affect other cgroup limitations, such as memory, disk, or network.
*The --isolation flag sets the isolation technology for a container, which is the mechanism that separates the container from the host or other containers. This flag is only available on Windows containers, and can be used to choose between process, hyperv, or process-isolated modes. However, this flag does not affect the cgroup limitations for a container, but only the level of isolation from the host or other containers.
*The --cap-drop flag drops one or more Linux capabilities for a container, which are the privileges that a process can use to perform certain actions on the system. This flag can be used to reduce the attack surface of a container by removing unnecessary or dangerous capabilities. However, this flag does not affect the cgroup limitations for a container, but only the capabilities granted to the container by the Docker daemon.
References:
*Runtime privilege and Linux capabilities
*Docker Security: Using Containers Safely in Production
*Docker run reference
*Docker Security: Are Your Containers Tightly Secured to the Ship? SlideShare
*[Secure Engine]
*[Configure a Pod to Use a Limited Amount of CPU]
*[Limit a container's resources]
*[Managing Container Resources]
*[Isolation modes]
*[Windows Container Isolation Modes]
*[Windows Container Version Compatibility]
*[Docker and Linux Containers]
*[Docker Security Cheat Sheet]
*[Docker Security: Using Containers Safely in Production]


NEW QUESTION # 177
You are troubleshooting a Kubernetes deployment called api, and want to see the events table for this object.
Does this command display it?
Solution: kubectl events deployment api

  • A. Yes
  • B. No

Answer: B

Explanation:
Explanation
= The command kubectl events deployment api is not a valid kubectl command. The correct command to display the events for a deployment object is kubectl get events --field-selector involvedObject.name=api12.
This command uses a field selector to filter the events by the name of the involved object, which is the deployment called api. Alternatively, you can use kubectl describe deployment api to see the details and the events for the deployment3. References:
* 1: kubectl Cheat Sheet | Kubernetes
* 2: kubernetes - kubectl get events only for a pod - Stack Overflow
* 3: Kubectl: Get Events & Sort By Time - ShellHacks


NEW QUESTION # 178
Is this a type of Linux kernel namespace that provides container isolation?
Solution. Process ID

  • A. Yes
  • B. No

Answer: A

Explanation:
Process ID is a type of Linux kernel namespace that provides container isolation. Linux namespaces are a feature of the Linux kernel that isolate and virtualize system resources of a collection of processes1. Process ID namespace isolates the process ID number space, meaning that processes in different PID namespaces can have the same PID2. This allows each container to have its own init process with PID 1, which is the ancestor of all other processes in the container3. Process ID namespace also affects other identifiers, such as thread IDs, parent process IDs, and session IDs4. References: Namespaces in operation), pid_namespaces), What is a PID namespace?, Linux Namespaces: PID)


NEW QUESTION # 179
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 -service udp dns-cache'

  • A. Yes
  • B. No

Answer: B

Explanation:
Explanation
This command does not create a swarm service that only listens on port 53 using the UDP protocol, because it has several syntax errors and missing options. According to the official documentation, the correct command should be:
docker service create --name dns-cache -p 53:53/udp --mode global dns-cache The errors and missing options are:
The --name flag is missing a dash (-).
The -p flag is missing the /udp suffix to specify the protocol.
The --service flag does not exist and should be replaced by --mode to specify the service mode.
The global option should follow the --mode flag to indicate that one task should run on each node.
References:
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-mode-mode
https://docs.docker.com/engine/reference/commandline/service_create/#options


NEW QUESTION # 180
......

The language in our DCA test guide is easy to understand that will make any learner without any learning disabilities, whether you are a student or a in-service staff, whether you are a novice or an experienced staff who has abundant experience for many years. Our Docker Certified Associate (DCA) Exam exam questions are applicable for everyone in all walks of life which is not depends on your educated level. Therefore, no matter what kind of life you live, no matter how much knowledge you have attained already, it should be a great wonderful idea to choose our DCA Guide Torrent for sailing through the difficult test. On the whole, nothing is unbelievable, to do something meaningful from now, success will not wait for a hesitate person, go and purchase!

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