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NEW QUESTION 42
A host machine has four CPUs available and two running containers. The sysadmin would like to assign two CPUs to each container.
Which of the following commands achieves this?
- A. Set the '--cpu-quota' flag to '1.3' on one container and '2,4' on the other container.
- B. Set the '--cpuset-cpus' flag to '.5' on both containers
- C. Set the '--cpuset-cpu's flag to '1.3' on one container and '2.4' on the other container.
- D. Set the '--cpuset-cpus' flag of the 'dockerd' process to the value 'even-spread'
Answer: B
NEW QUESTION 43
Will this configuration achieve fault tolerance for managers in a swarm?
Solution: an odd number of manager nodes, totaling more than two
- A. Yes
- B. No
Answer: A
NEW QUESTION 44
Which statement is correct about cluster management in Docker Enterprise Edition 3.x?
- A. Clusters can contain Windows 10 and Windows Server 2016 only.
- B. Clusters can contain Linux, Windows Server 2016 and 2019, and Linux on IBM z Systems.
- C. Clusters can contain Linux and Windows Server 2008 R2 only.
- D. Clusters can contain Linux only.
Answer: A
NEW QUESTION 45
What is the purpose of a client bundle in the Universal Control Plane?
- A. Provide a user with a Docker client binary compatible with the Universal Control Plane
- B. Authenticate a user using client certificates to the Universal Control Plane
- C. Group multiple users in a team in the Universal Control Plane
- D. Provide a new user instructions for how to login to the Universal Control Plane
Answer: B
NEW QUESTION 46
A user is having problems running Docker. Which of the following will start Docker in debug mode?
- A. Start the 'dockerd' process manually with the '--raw-logs' flag set to debug
- B. Set the debug key to true in the 'daemon.json' file.
- C. Set the logging key to debug in the 'daemon.json' file.
- D. Start the 'dockerd' process manually with the '--logging' flag set to debug
Answer: B
NEW QUESTION 47
A server is running low on disk space. What command can be used to check the disk usage of images,
containers, and volumes for Docker engine?
- A. 'docker system free'
- B. 'docker system prune'
- C. 'docker system ps'
- D. 'docker system df'
Answer: D
NEW QUESTION 48
Is this a Linux kernel namespace that is disabled by default and must be enabled at Docker engine runtime to be used?
Solution: net
- A. Yes
- B. No
Answer: B
NEW QUESTION 49
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: node taints
- A. Yes
- B. No
Answer: B
NEW QUESTION 50
You have created a Docker bridge network on a host with three containers attached, how do you make this containers accessible outside of the host?
- A. Use network connect to access the containers on the bridge network
- B. Use network attach to access the containers on the bridge network
- C. Use --link to access the containers on the bridge network
Correct - D. Use either EXPOSE or --publish to access the containers on the bridge network
Answer: D
NEW QUESTION 51
You want to create a container that is reachable from its host's network. Does this action accomplish this?
Solution: Use either EXPOSE or --publish to access the containers on the bridge network
- A. Yes
- B. No
Answer: A
NEW QUESTION 52
Which of the following is true about using the '-P' option when creating a new container?
- A. Docker binds each exposed container port to a random port on all the host's interface
- B. Docker binds each exposed container port with the same port on the host
- C. Docker gives extended privileges to the container.
- D. Docker binds each exposed container port to a random port on a specified host interface
Answer: A
NEW QUESTION 53
Will this command display a list of volumes for a specific container?
Solution: docker volume inspect nginx'
- A. Yes
- B. No
Answer: B
NEW QUESTION 54
Which of the following modes can be used for service discovery of a Docker swarm service (Pick 2 correct answers)
- A. Overlay with --endpoint-mode overlay
- B. DNS Round-Robin with --endpoint-mode dnsrr
- C. Ingress with --endpoint-mode ingress
- D. Network Address Translation(NAT) with --endpoint-mode nat
- E. Virtual IP (VIP) with --endpoint-mode vip
Answer: B,E
NEW QUESTION 55
Which of the following is true about overlay networks?
- A. Overlay networks are first created on the manager nodes. Then they are created on the
worker nodes once a task is scheduled on the specific worker node. - B. Overlay networks are only created on the manager nodes.
- C. Overlay networks are created on all cluster nodes when you create the overlay network.
- D. Overlay networks are created only on the manager node that you created the overlay
networking on
Answer: C
NEW QUESTION 56
Is this an advantage of multi-stage builds?
Solution: optimizes Images by copying artifacts selectively from previous stages
- A. Yes
- B. No
Answer: A
NEW QUESTION 57
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 logs deployment api
- A. Yes
- B. No
Answer: B
NEW QUESTION 58
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: B
NEW QUESTION 59
You have deployed a service to swarm. Which command uses the Docker CLI to set the number of tasks of the services to 5? (choose 2)
- A. 'docker service update --replicas=5 <service-id>'
- B. 'docker replica update <service-id>=5'
- C. 'docker service scale <service-id> = 5''
- D. 'docker update service <service-id>=5'
- E. 'docker service replicas <service-id>=5'
Answer: A,C
NEW QUESTION 60
Will this command display a list of volumes for a specific container?
Solution: 'docker container inspect nginx'
- A. Yes
- B. No
Answer: A
NEW QUESTION 61
The following health check exists in a Dockerfile:
'HEALTCHECK
CMD curl --fail http://localhost/health || exit 1'
Which of the following describes its purpose?
- A. Defines the health check endpoint on the localhost interface for external monitoring tools to monitor the health of the docker engine.
- B. Defines the health check endpoint on the local host interface for containers to monitor the health of the docker engine.
- C. Defines the health check for the containerized application so that the application health can be monitored by the Docker engine
- D. Defines the action taken when container health fails, which in this case will kill the container with exit status 1.
Answer: D
NEW QUESTION 62
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
NEW QUESTION 63
In Docker Trusted Registry, how would a user prevent an image, for example 'nginx:latest' from being
overwritten by another user with push access to the repository?
- A. Keep a backup copy of the image on another repository.
- B. Tag the image with 'nginx:immutable'
- C. Remove push access from all other users.
- D. Use the DTR web UI to make the tag immutable.
Answer: D
NEW QUESTION 64
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