(PDF) Docker Certified Associate DCA Exam and Certification Test Engine
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NEW QUESTION 98
Is this a way to configure the Docker engine to use a registry without a trusted TLS certificate?
Solution: Pass the '--insecure-registry' flag to the daemon at run time.
- A. No
- B. Yes
Answer: B
NEW QUESTION 99
What service mode is used to deploy a single task of a service to each node?
- A. global
- B. replicated
- C. distributed
- D. universal
- E. spread
Answer: A
NEW QUESTION 100
Is this a type of Linux kernel namespace that provides container isolation?
Solution: Authentication
- A. No
- B. Yes
Answer: B
NEW QUESTION 101
Which flag for a service would allow a container to consume more than 2 GB of memory only when there is no memory contention but would also prevent a container from consuming more than 4GB of memory, in any case?
- A. --limit-memory 2GB --reserve-memory 4GB
- B. --memory-swap 4GB --limit-memory 2GB
- C. --memory-swap 2GB --limit-memory 4GB
- D. --limit-memory 4GB --reserve-memory 2GB
Answer: C
NEW QUESTION 102
Will this command list all nodes in a swarm cluster from the command line?
Solution: 'docker node Is'
- A. No
- B. Yes
Answer: A
NEW QUESTION 103
What is the purpose of a client bundle in the Universal Control Plane?
- A. Group multiple users in a team in the Universal Control Plane
- B. Provide a user with a Docker client binary compatible with the Universal Control Plane
- C. Authenticate a user using client certificates to the Universal Control Plane
- D. Provide a new user instructions for how to login to the Universal Control Plane
Answer: C
NEW QUESTION 104
Is this a supported user authentication method for Universal Control Plane?
Solution: PAM
- A. No
- B. Yes
Answer: A
NEW QUESTION 105
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 events deployment api
- A. No
- B. Yes
Answer: A
NEW QUESTION 106
Does this describe the role of Control Groups (cgroups) when used with a Docker container?
Solution: role-based access control to clustered resources
- A. No
- B. Yes
Answer: A
NEW QUESTION 107
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. No
- B. Yes
Answer: B
NEW QUESTION 108
Which statement is true about DTR garbage collection?
- A. Garbage collection removes unreferenced image layers from DTR's backend storage.
- B. Garbage collection removes exited containers from cluster nodes.
- C. Garbage collection removes unused volumes from cluster nodes
- D. Garbage collection removes DTR images that are older than a configurable of days
Answer: A
NEW QUESTION 109
Which one of the following commands will result in the volume being removed automatically once the container
has exited?
- A. 'docker run --del -v /foo busybox'
- B. 'docker run --remove -v /foo busybox'
- C. 'docker run --rm -v /foo busybox'
- D. 'docker run --read-only -v /foo busybox'
Answer: C
NEW QUESTION 110
What is the difference between a resource limit and a resource reservation when scheduling services?
- A. A resource limit is used to find a host with adequate resources for scheduling a hard limit for your service, while a reservation is hard limit for your service.
- B. A resource limit and a resource reservation can be used interchangeably.
- C. A resource limit is a soft limit for your service, while a reservation is hard limit and the docker engine will do its best to keep your service at the limit.
- D. A resource limit is hard limit for your service, while a reservation is used to find a host with adequate resources for scheduling. Correct
Answer: B
NEW QUESTION 111
Does this command display all the pods in the cluster that are labeled as 'env: development'?
Solution: 'kubectl get pods --all-namespaces -I env=development'
- A. No
- B. Yes
Answer: B
NEW QUESTION 112
Will this command ensure that overlay traffic between service tasks is encrypted?
Solution: docker network create -d overlay --secure
- A. No
- B. Yes
Answer: A
NEW QUESTION 113
A container named "analytics" that stores results in a volume called "data" was created.
docker run -d --name=analytics -v data:/data app1
How are the results accessed in "data" with another container called "app2"?
- A. docker run -d --name=reports --volume=data app2
- B. docker run -d --name=reports --mount=app1 app2
- C. docker run -d --name=reports --volumes-from=analytics app2
- D. docker run -d --name=reports --volume=app1 app2
Answer: C
NEW QUESTION 114
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. No
- B. Yes
Answer: A
NEW QUESTION 115
One of several containers in a pod is marked as unhealthy after failing its livenessProbe many times. Is this the action taken by the orchestrator to fix the unhealthy container?
Solution: Kubernetes automatically triggers a user-defined script to attempt to fix the unhealthy container.
- A. No
- B. Yes
Answer: A
NEW QUESTION 116
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