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NEW QUESTION 92
A docker service ‘web’ is running with a scale factor of 1 (replicas = 1).
Bob intends to use the command ‘docker service update –replicas=3 web’.
Alice intends to use the command ‘docker service scale web=3’.
How do the outcomes oft these two commands differ?

Bob’s command results in an error. Alice’s command updates the number of replicas of the ‘web’ service to 3.

Bob’s command only updates the service definition, but no new replicas are started. Alice’s command results in the actual scaling up of the ‘web’ service.

Bob’s command updates the number of replicas of the ‘web’ service to 3. Alice’s command results in an error.

Both Bob’s and Alice’s commands result in exactly the same outcome, which is 3 instances of the ‘web’ service.

NEW QUESTION 93
What is the docker command to setup a swarm?

docker swarm init

docker swarm create

docker init swarm

docker create swarm

NEW QUESTION 94
Does this command display all the pods in the cluster that are labeled as ‘env: development’?
Solution: ‘kubectl get pods -I env=development’

Yes

NEW QUESTION 95
You have just executed ‘docker swarm leave’ on a node. What command can be run on the same node to confirm it has left the cluster?

docker node ls

docker system info

docker system status

NEW QUESTION 96
Is this a Linux kernel namespace that is disabled by default and must be enabled at Docker engine runtime to be used?
Solution: user

Yes

NEW QUESTION 97
After creating a new service named ‘http’, you notice that the new service is not registering as healthy. How do you view the list of historical tasks for that service by using the command line?

‘docker inspect http’

‘docker service inspect http’

‘docker service ps http’

‘docker ps http’

NEW QUESTION 98
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 describe deployment api

Yes

NEW QUESTION 99
Is this a type of Linux kernel namespace that provides container isolation?
Solution: Network

Yes

NEW QUESTION 100
Which one of the following commands will result in the volume being removed automatically once the container
has exited?

‘docker run –del -v /foo busybox’

‘docker run –read-only -v /foo busybox’

‘docker run –rm -v /foo busybox’

‘docker run –remove -v /foo busybox’

NEW QUESTION 101
You configure a local Docker engine to enforce content trust by setting the environment variable
DOCKER_CONTENT_TRUST=1.
If myorg/myimage: 1.0 is unsigned, does Docker block this command?
Solution: docker image import <tarball> myorg/myimage:1.0

Yes

NEW QUESTION 102
What is the purpose of multi-stage builds?

Better logical separation of Dockerfile instructions for better readability

Optimizing images by copying artifacts selectively from previous stages

Better caching when building Docker images

Faster image builds by allowing parallel execution of Docker builds

NEW QUESTION 103
Wha is the purpose of Docker Content Trust?

Signing and verification of image tags

Enabling mutual TLS between the Docker client and server

Docker registry TLS verification and encryption

Indicating an image on Docker Hub is an official image

NEW QUESTION 104
You want to provide a configuration file to a container at runtime. Does this set of Kubernetes tools and steps accomplish this?
Solution: Turn the configuration file into a configMap object, use it to populate a volume associated with the pod, and mount that file from the volume to the appropriate container and path.

Yes

NEW QUESTION 105
Does this describe the role of Control Groups (cgroups) when used with a Docker container?
Solution: role-based access control to clustered resources

Yes

NEW QUESTION 106
Is this a function of UCP?
Solution: scans images to detect any security vulnerability

Yes

NEW QUESTION 107
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.

Yes

NEW QUESTION 108
Will this command display a list of volumes for a specific container?
Solution: ‘docker container inspect nginx’

Yes

[Q92-Q108] Pass Your DCA Exam Easily With 100% Exam Passing Guarantee [2022]

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