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Docker Certified Associate (DCA) certification exam is a popular exam in the IT industry that aims to validate the skills and expertise of candidates in Docker technologies. DCA exam is designed to test the knowledge of candidates in various aspects of Docker, including Docker architecture, Docker installation and configuration, Docker networking, Docker images and containers, Docker orchestration, and Docker security. Docker Certified Associate (DCA) Exam certification is an industry-recognized credential that demonstrates the competency of candidates in Docker technologies and helps them stand out in the job market.

How to study the Docker Certified Associate Exam

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Docker Certified Associate (DCA) Exam Sample Questions (Q67-Q72):

NEW QUESTION # 67
Will this sequence of steps completely delete an image from disk in the Docker Trusted Registry?
Solution. Delete the image and delete the image repository from Docker Trusted Registry.

A. Yes
B. No

Answer: B

Explanation:
The sequence of steps will not completely delete an image from disk in the Docker Trusted Registry. Deleting an image and deleting an image repository from the Docker Trusted Registry will only remove the references to the image, but not the actual image data on the disk1. To completely delete an image from disk, you need to run the garbage collection command on the registry server, which will delete any unreferenced blobs2. The garbage collection command is bin/registry garbage-collect /path/to/config.yml3. References: Deleting an image), Garbage collection), Running garbage collection)

NEW QUESTION # 68
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 # 69
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. Yes
B. No

Answer: A

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 runsonly on production nodes3. This way, you can ensure that development and production containers are running on separate nodes in a given Swarm cluster. Reference:
Add labels to swarm nodes
Using placement constraints with Docker Swarm
Multiple label placement constraints in docker swarm

NEW QUESTION # 70
How do you change the default logging driver for the docker daemon in Linux?

A. Install a logging agent on the Linux host.
B. At the command line, type: docker log driver set <driver name>
C. Set the value of log-driver to the name of the logging driver In the daemon.json In /etc/doc
D. Use the -log-driver' flag when you run a container.

Answer: A

NEW QUESTION # 71
Is this the purpose of Docker Content Trust?
Solution: Verify and encrypt Docker registry TLS.

A. Yes
B. No

Answer: B

Explanation:
Docker Content Trust (DCT) is a feature that allows users to verify the integrity and publisher of container images they pull or deploy from a registry server, signed on a Notary server12. DCT does not verify or encrypt the Docker registry TLS, which is a separate mechanism for securing the communication between the Docker client and the registry server. The purpose of DCT is to ensure that the images are not tampered with or maliciously modified by anyone other than the original publisher3. References:
* Content trust in Docker | Docker Docs
* Docker Content Trust: What It Is and How It Secures Container Images
* Automation with content trust | Docker Docs

NEW QUESTION # 72
......

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How to study the Docker Certified Associate Exam

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Docker Certified Associate (DCA) Exam Sample Questions (Q67-Q72):

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