Docker Certified Associate

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Docker Certified Associate - TEST

Which of the following steps should you perform to sign images in a way that UCP trusts them? (select all that apply)

1 point

Initialize trust metadata for the repository

Configure Notary client

Approve image sign on UCP

Delegate signing to the keys in your UCP client bundle

Which of these swarm manager configurations will cause the cluster to be in a lost quorum state?

1 point

5 managers of which 3 are healthy

1 manager of which 1 is healthy

4 managers of which 2 are healthy

3 managers of which 2 are healthy

Clear selection

What command will create three pod replicas?

1 point

kubectl scale deployment my-deployement --replicas=3

kubectl create replicas 3

kubectl scale pod 3

Clear selection

What happens to a scheduled pod that cannot have its resource requests met by a node?

1 point

It remains in the PENDING state.

It's automatically removed after creation

Kubernetes cannot create a Pod a throws an error

Clear selection

You have been assigned a task to host your organization’s event blog using WordPress and MySQL database on a 25 active nodes swarm cluster. Make sure that one task of MySQL database service is deployed on each active node in swarm cluster. Which of the following commands will achieve your purpose?

1 point

docker service create --name mySQL --global mysql docker service create --name wordpress --replicas=25 wordpress

docker service create --name mySQL --mode global mysql docker service create --name wordpress --replicas=25 wordpress

docker service create --name mySQL --config global mysql docker service create --name wordpress --replicas=25 wordpress

None of the above

Clear selection

Can a secret be visible to multiple containers in a pod?

1 point

Yes

Clear selection

Describe what the EXPOSE instruction does.

1 point

It automatically publishes ports when running a container.

It documents ports intended for publishing at the time of running a container.

It makes a container's port accessible externally.

It causes the container to listen on a port

Clear selection

What would be the output of the final pwd command of a container built from the following Dockerfile: FROM alpine WORKDIR /a WORKDIR /b WORKDIR c CMD pwd

1 point

/b/c

Clear selection

In Docker Trusted Registry, how would a user prevent an image from being overwritten by another user which has push access to the repository?

1 point

Keep a backup copy of the image on another repository.

Tag the image with 'nginx:immutable'

Use the DTR web UI to make the tag immutable

Remove push access from all other users

Clear selection

Which of the following is not an endpoint exposed by Docker Trusted Registry (DTR) that can be used to assess the health of a Docker Trusted Registry replica?

1 point

/api/v0/meta/cluster_status

/nginx_status

/replica_status

/health

Clear selection

To configure Docker daemon to start as the system boots up, which of the following commands is correct for most Linux distributions?

1 point

sudo systemctl start docker

sudo systemctl up docker

sudo systemctl enable docker

sudo systemctl default docker

Clear selection

What docker command can you use to find the current logging driver for a running container?

1 point

docker info

docker inspect

docker config

docker status

Clear selection

Which of the following options for resource limitation is representative of a Control Group (cgroup) when added to a container? (Choose the 2 correct answers)

1 point

-end=[#]

--cpus=[value]

--limit=[#]

--memory=[amount b/k/m/g]

Which of the following namespaces is not activated by default?

1 point

pid

user

mnt

uts

Clear selection

Which of the following is a step in backing up the Docker Swarm?

1 point

Back up the contents of /etc/docker/swarm on a Swarm manager.

Back up the layered file systems of all containers running within the swarm

Back up the contents of /var/lib/docker/swarm on a Swarm manager.

Back up the contents of /etc/docker on a Swarm manager.

Clear selection

How can you configure the default logging driver for containers?

1 point

Set the log-driver option in the key.json file

Use loging-driver –flag

Use --log-driver flag

Set the log-driver option in the deamon.json file

Clear selection

Which of the following features is supported by control groups?

1 point

Isolate processes in a container

Manage certificates

Limit CPU usage within a container

Collect logs

Clear selection

A user is having problems running Docker. How can you start Docker in debug mode?

1 point

Set the debug key to true in the 'daemon.json' file.

Start the 'dockerd' process manually with the '--raw-logs' flag set to debug

Start the 'dockerd' process manually with the '--logging' flag set to debug

Set the logging key to debug in the 'daemon.json' file.

Clear selection

With which flag should you run docker swarm init, after restoring a swarm backup, to ensure that the node does not attempt to connect to nodes that were part of the old swarm?

1 point

--force-init

--restore

--force

--force-new-cluster

Clear selection

When changes made to a Docker image are ready to be published, which of the following commands would make a new image available, called ‘httpd:v2’?

1 point

docker checkin httpd:v2

docker tag httpd:v2 httpd:latest

docker tag httpd:latest httpd:v2

Clear selection

Submit

Clear form

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