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The DCA Exam is a valuable credential for IT professionals who want to demonstrate their expertise in Docker. DCA exam is designed to be challenging, and passing it requires a deep understanding of Docker’s architecture and best practices. DCA exam consists of 55 multiple-choice questions, and the candidate has 90 minutes to complete it. To pass the exam, the candidate must score at least 65%.

Docker Certified Associate (DCA) Exam is a certification program designed to validate the skills and knowledge of IT professionals who work with Docker. Docker is an open-source platform that allows developers to build, ship, and run applications as containers. The DCA Exam Tests the candidate’s knowledge of Docker’s core concepts, including containerization, Docker networking, and the Docker CLI. DCA exam is a rigorous test of the candidate’s ability to design, deploy, and manage Docker applications.

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The DCA certification exam is a valuable credential for professionals who work with Docker technologies. Docker Certified Associate (DCA) Exam certification validates an individual's knowledge and skills related to Docker and can lead to better job opportunities and higher salaries. Additionally, the DCA Certification is recognized by many organizations and can help professionals stand out in a crowded market.

Docker Certified Associate (DCA) Exam Sample Questions (Q47-Q52):

NEW QUESTION # 47
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: Add a volume to the pod that sets hostPath.path: /data, and then mount this volume into the pod's containers as desired.

A. Yes
B. No

Answer: B

Explanation:
Explanation
The solution will not work because a hostPath volume mounts a file or directory from the host node's filesystem into the pod, not from the laptop1. The host node is the VM or machine where the pod is scheduled to run, not the machine where the kubectl commands are executed. Therefore, the /data directory on the laptop will not be accessible to the pod unless it is also present on the host node. A better solution would be to use a persistent volume that can be accessed from any node in the cluster, such as NFS, AWS EBS, or Azure Disk2. References:
* 1: Volumes | Kubernetes
* 2: Persistent Volumes | Kubernetes

NEW QUESTION # 48
A company's security policy specifies that development and production containers must run on separate nodes in a given Swarm cluster.
Can this be used to schedule containers to meet the security policy requirements?
Solution: label contraints

A. No
B. Yes

Answer: B

Explanation:
Explanation
Label constraints can be used to schedule containers to meet the security policy requirements. Label constraints allow you to specify which nodes a service can run on based on the labels assigned to the nodes1.
For example, you can label the nodes that are intended for development with env=dev and the nodes that are intended for production with env=prod. Then, you can use the --constraint flag when creating a service to restrict it to run only on nodes with a certain label value. For example, docker service create --name dev-app
--constraint 'node.labels.env == dev' ... will create a service that runs only on development nodes2. Similarly, docker service create --name prod-app --constraint 'node.labels.env == prod' ... will create a service that runs only on production nodes3. This way, you can ensure that development and production containers are running on separate nodes in a given Swarm cluster. References:
* Add labels to swarm nodes
* Using placement constraints with Docker Swarm
* Multiple label placement constraints in docker swarm

NEW QUESTION # 49
Which one of the following commands will show a list of volumes for a specific container?

A. 'docker volume logs nginx --containers'
B. 'docker volume inspect nginx'
C. 'docker container inspect nginx'
D. 'docker container logs nginx --volumes'

Answer: C

NEW QUESTION # 50
Is this a type of Linux kernel namespace that provides container isolation?
Solution: Network

A. No
B. Yes

Answer: B

Explanation:
Explanation
Network is a type of Linux kernel namespace that provides container isolation. Network namespaces isolate the system resources associated with networking, such as network interfaces, IP addresses, routing tables, firewall rules, etc. Each network namespace has its own virtual network stack, and processes in different network namespaces can communicate through virtual network devices or tunnels1. Network namespaces are used byDocker to create isolated networks for containers, and allow users to customize the network configuration and connectivity of each container2. References:
* network_namespaces(7) - Linux manual page
* Docker network overview | Docker Documentation

NEW QUESTION # 51
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: Create a Dockerfile for each environment, specifying ports and ENV variables for certificates.

A. Yes
B. No

Answer: B

Explanation:
While creating a Dockerfile for each environment is a possible solution, it is not the most efficient or scalable way to provision configuration to containers at runtime. Docker provides several mechanisms to inject configuration into containers at runtime, such as environment variables, command line arguments, Docker secrets for sensitive data, or even configuration files mounted as volumes. These methods allow the same Docker image to be used across multiple environments, promoting immutability and consistency across your deployments. Creating a separate Dockerfile for each environment would mean maintaining multiple versions of the Dockerfile, which could lead to inconsistencies and is generally not a recommended practice.

NEW QUESTION # 52
......

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Pass Guaranteed 2025 DCA: Pass-Sure Valid Dumps Docker Certified Associate (DCA) Exam Book

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Docker Certified Associate (DCA) Exam Sample Questions (Q47-Q52):

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