DCA Exam Questions

Does this command display all the pods in the cluster that are labeled as 'env: development'? Solution: 'kubectl get pods --all-namespaces -label env=development'

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'

Will this command display a list of volumes for a specific container? Solution: 'docker container inspect nginx'

Will this command display a list of volumes for a specific container? Solution: docker volume logs nginx --containers'

Will this command display a list of volumes for a specific container? Solution: docker volume inspect nginx'

Will this command display a list of volumes for a specific container? Solution: docker container logs nginx --volumes'

Does this describe the role of Control Groups (cgroups) when used with a Docker container? Solution: user authorization to the Docker API

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

Does this describe the role of Control Groups (cgroups) when used with a Docker container? Solution: accounting and limiting of resources

Will this command ensure that overlay traffic between service tasks is encrypted? Solution: docker network create -d overlay -o encrypted=true <network-name>

Will this command ensure that overlay traffic between service tasks is encrypted? Solution: docker network create -d overlay --secure

Will this command ensure that overlay traffic between service tasks is encrypted? Solution: docker service create --network --secure

Will this command ensure that overlay traffic between service tasks is encrypted? Solution: docker service create --network --encrypted

You want to create a container that is reachable from its host's network. Does this action accomplish this? Solution: Use --link to access the container on the bridge network.

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...

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 netw...

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

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

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 ap...

Will this Linux kernel facility limit a Docker container's access to host resources, such as CPU or memory? Solution: seccomp

Will this Linux kernel facility limit a Docker container's access to host resources, such as CPU or memory? Solution: namespaces

Will this Linux kernel facility limit a Docker container's access to host resources, such as CPU or memory? Solution: cgroups

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?...

During development of an application meant to be orchestrated by Kubernetes, you want to mount the /data directory on your laptop into a container. Will this strategy successfully...

During development of an application meant to be orchestrated by Kubernetes, you want to mount the /data directory on your laptop into a container. Will this strategy successfully...

Is this an advantage of multi-stage builds? Solution: better caching when building Docker images

Is this an advantage of multi-stage builds? Solution: optimizes Images by copying artifacts selectively from previous stages

Will this command list all nodes in a swarm cluster from the command line? Solution: 'docker swarm nodes'

Will this command list all nodes in a swarm cluster from the command line? Solution: 'docker node Is'

Will this command list all nodes in a swarm cluster from the command line? Solution: `docker Is -a'

Is this a type of Linux kernel namespace that provides container isolation? Solution: Storage

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

Is this a type of Linux kernel namespace that provides container isolation? Solution: Authentication

Is this statement correct? Solution: A Dockerfile provides instructions for building a Docker image

A users attempts to set the system time from inside a Docker container are unsuccessful. Could this be blocking this operation? Solution: inter-process communication

A users attempts to set the system time from inside a Docker container are unsuccessful. Could this be blocking this operation? Solution: Linux capabilities

Your organization has a centralized logging solution, such as Splunk. Will this configure a Docker container to export container logs to the logging solution? Solution: docker syst...

Your organization has a centralized logging solution, such as Splunk. Will this configure a Docker container to export container logs to the logging solution? Solution: docker logs...

Your organization has a centralized logging solution, such as Splunk. Will this configure a Docker container to export container logs to the logging solution? Solution: Set the log...

A persistentVolumeClaim (PVC) is created with the specification storageClass: "", and size requirements that cannot be satisfied by any existing persistentVolume. Is this an action...

You created a new service named 'http' and discover it is not registering as healthy. Will this command enable you to view the list of historical tasks for this service? Solution:...

You created a new service named 'http' and discover it is not registering as healthy. Will this command enable you to view the list of historical tasks for this service? Solution:...

You created a new service named 'http' and discover it is not registering as healthy. Will this command enable you to view the list of historical tasks for this service? Solution:...

Will this action upgrade Docker Engine CE to Docker Engine EE? Solution: Delete '/var/lib/docker' directory.

Will this action upgrade Docker Engine CE to Docker Engine EE? Solution: Uninstall 'docker-ce' package before installing 'docker-ee' package.

Will this action upgrade Docker Engine CE to Docker Engine EE? Solution: Manually download the 'docker-ee' package

The Kubernetes yaml shown below describes a clusterIP service. Is this a correct statement about how this service routes requests? Solution: Traffic sent to the IP of this service...

The Kubernetes yaml shown below describes a clusterIP service. Is this a correct statement about how this service routes requests? Solution: Traffic sent to the IP of any pod with...

In the context of a swarm mode cluster, does this describe a node? Solution: a physical machine participating in the swarm

In the context of a swarm mode cluster, does this describe a node? Solution: a virtual machine participating in the swarm