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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%.
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Docker Certified Associate (DCA) Exam Sample Questions (Q62-Q67):
NEW QUESTION # 62
A persistentVolumeClaim (PVC) is created with the specification storageClass: "".and size requirements that cannot be satisfied by any existing persistentVolume.
Is this an action Kubernetes takes in this situation?
Solution: Kubernetes returns an error indicating that the PVC could not be bound with the current resources.
Answer: A
NEW QUESTION # 63
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: Provision a Docker config object for each environment.
Answer: A
Explanation:
= Provisioning a Docker config object for each environment is a way to provision configuration to containers at runtime. Docker configs allow services to adapt their behaviour without the need to rebuild a Docker image.
Services can only access configs when explicitly granted by a configs attribute within the services top-level element. As with volumes, configs are mounted as files into a service's container's filesystem1. Docker configs are supported on both Linux and Windows services2. References: Docker Documentation, Configs top-level element
NEW QUESTION # 64
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'
Answer: B
NEW QUESTION # 65
You want to create a container that is reachable from its host's network. Does this action accomplish this?
Solution: Use network attach to access the containers on the bridge network
Answer: B
Explanation:
Explanation
Using network attach to access the containers on the bridge network does not make the container reachable from its host's network. The network attach option connects a running container to another network, but it does not expose any ports to the host. To make a container reachable from its host's network, you need to use either EXPOSE or --publish to access the containers on the bridge network. References:
https://docs.docker.com/engine/reference/commandline/network_connect/,
https://docs.docker.com/config/containers/container-networking/
NEW QUESTION # 66
Following the principle of least privilege, which of the following methods can be used to securely grnt access to the specific user to communicate to a Docker engine? (Choose two.)
- A. Add the user to the 'docker' group on the server or specify the groue with the '--group' Docker daemon option.
- B. Utilize the '--host 127.0.0.1:2375' option to the Docker daemon to listen on port 2375 over TCP on localhost
- C. Give the user root access to the server to allow them to run Docker commands as root.
- D. Utilize the '--host 0.0.0.0:2375' option to the Docker daemon to listen on port 2375 over TCP on all interfaces
- E. Utilize openssl to create TLS client and server certificates, configuring the Docker engine to use with mutual TLS over TCP.
Answer: A,E
NEW QUESTION # 67
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