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Docker Certified Associate (DCA) exam is a certification exam that tests an individual's knowledge and skills related to Docker technologies. DCA exam is designed to validate the skills of professionals who work with Docker on a regular basis, including developers, system administrators, and DevOps engineers. DCA exam covers a range of topics related to Docker, including containerization, orchestration, networking, security, and troubleshooting.

Docker Certified Associate (DCA) Certification Exam is a professional certification that validates a candidate’s knowledge and proficiency in using Docker Enterprise Edition (EE) and Docker Community Edition (CE) in a real-world environment. DCA Exam is designed to test the candidate’s ability to perform tasks related to Docker, such as deploying and managing Docker containers, working with images, networking, and security.

Docker Certified Associate (DCA) Exam Sample Questions (Q169-Q174):

NEW QUESTION # 169
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"

A. Yes
B. No

Answer: B

Explanation:
The command docker service create -name dns-cache -p 53:53 -constraint networking.protocol.udp=true dns-cache will not create a swarm service that only listens on port 53 using the UDP protocol. This command has several syntax errors and invalid options. The correct syntax for creating a swarm service is docker service create [OPTIONS] IMAGE [COMMAND] [ARG...]1. The correct options for specifying the service name, port mapping, and network mode are --name, --publish, and --network respectively1. The option -constraint is not a valid option for the docker service create command. To create a swarm service that only listens on port
53 using the UDP protocol, you need to use the --publish option with
the protocol=udp and mode=host parameters, and the --network option with the host value23. For example, the following command creates a global service using host mode and bypassing the routing mesh2:
docker service create --name dns-cache
--publish published=53,target=53,protocol=udp,mode=host
--mode global
--network host
dns-cache
References:
* 1: docker service create | Docker Docs
* 2: Use swarm mode routing mesh | Docker Docs
* 3: Manage swarm service networks | Docker Docs

NEW QUESTION # 170
From a DevOps process standpoint, it is best practice to keep changes to an application in version control. Which of the following will allow changes to a docker Image to be stored in a version control system?

A. A dockerfile
B. A docker-compose.yml file
C. docker commit
D. docker save

Answer: C

NEW QUESTION # 171
The output of which command can be used to find the architecture and operating system an image is
compatible with?

A. docker image inspect --filter {{.Architecture}} {{.OS}} ' <image-id>
B. docker image info <image-id>
C. docker image inspect --format {{.Architecture}} {{.OS}} ' <image-id>
D. docker image ls <image-id>

Answer: C

NEW QUESTION # 172
Is this a supported user authentication method for Universal Control Plane?
Solution.x.500

A. Yes
B. No

Answer: B

Explanation:
Explanation
x.500 is not a supported user authentication method for Universal Control Plane (UCP). UCP supports two types of user authentication methods: built-in and external1. Built-in authentication uses the UCP's own database to store and verify user credentials. External authentication uses an external LDAP or Active Directory service to manage user accounts and passwords1. x.500 is a standard for directory services, which can be used by LDAP or Active Directory, but it is not a user authentication method by itself2. References:
* User authentication | Docker Docs
* X.500 - Wikipedia

NEW QUESTION # 173
The Kubernetes yaml shown below describes a networkPolicy.

Will the networkPolicy BLOCK this trafftc?
Solution. a request issued from a pod bearing the tier: backend label, to a podbearing the tier: frontend label

A. No
B. Yes

Answer: B

Explanation:
The networkPolicy will block the traffic from a pod bearing the tier: backend label, to a pod bearing the tier: frontend label. The networkPolicy specifies that only pods with the tier: frontend label can access the pods with the app: guestbook-api and tier: backend labels on port 801. Any other traffic to the backend pods will be denied by default2. Therefore, a request issued from a pod bearing the tier: backend label, to a pod bearing the tier: frontend label will be blocked by the networkPolicy. Reference: Connect a Frontend to a Backend Using Services), Network Policies)

NEW QUESTION # 174
......

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Carl Hunt Carl Hunt

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