DCA Exam Questions

Which of the following commands wifi automatically create a volume when a container is started?

Which one of the following commands will show a list of volumes for a specific container?

Which of the following constitutes a production-ready devicemapper configuration for the Docker engine?

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

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" wi...

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?

Which of the following are types of namespaces used by Docker to provide isolation? (Choose 2.)

Which of the following namespaces is disabled by default and must be enabled at Docker engine runtime in order to be used?

Which of the following statements is true about secrets?

Following the principle of least privilege, which of the following methods can be used to securely grnt access to the specific user to communicate to a Docker engine? (Choose two.)

Which of the following is supported by control groups?

Wha is the purpose of Docker Content Trust?

What is the purpose of a client bundle in the Universal Control Plane?

When using the Docker client to push an image to a registry, what environment variable is used to instruct the client to perform signing of the image?

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?

Which of the following commands will ensure that overlay traffic between service tasks is encrypted?

Which of the following commands will create a swarm service which only listens on port 53 using the UDP protocol?

Which of the following is true about using the '-P' option when creating a new container?

What behavior is expected when a service is created with the following command: 'docker service create --publish 8000:80 nginx'

Which set of commands can identify the publishd port(s) for a container? (Choose 1.)

Which of the following is true about overlay networks?

Which of the following modes can be used for service discovery of a Docker swarm service (Pick 2 correct answers)

A user is having problems running Docker. Which of the following will start Docker in debug mode?

Which command interactively monitors all container activity in the Docker engine?

What is used by the kernel to Isolate resources when running Docker containers?

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?

Which of the following commands is used to display system-wide Docker configuration on a host?

If installing Docker using devicemapper for storage with the Intent to run production workloads, how should devicemapper be configured

Which of the following is required to install Docker EE from a package repository?

How do you configure Docker engine to use a registry that is not configured with TLS certificates from a trusted CA?

The output of which command can be used to find the architecture and operating system an image is compatible with?

An application image runs in multiple environments, and each environment uses different certificates and ports, what is the best practice to deploy the containers?

What is the purpose of multi-stage builds?

From a DevOps process standpoint, it is best practice to keep changes to an application in version control. Which of the following will allow changes to a docker Image to be stored...

When seven managers are in a swarm cluster how would they be distributed across three datacenters or availability zones?

What is the difference between a resource limit and a resource reservation when scheduling services?

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?

What is the recommended way to configure the daemon flags and environment variables for your Docker daemon in a platform independent way?

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 service 'wordpress' is running using a password string to connect to a non-Dockerized database service. The password string is passed into the 'wordpress' service as a Docker sec...

What service mode is used to deploy a single task of a service to each node?

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...

The following health check exists in a Dockerfile: Which of the following describes its purpose?

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

Which of the following commands starts a Redis container and configures it to always restart unless it is explicitly stopped or Docker is restarted?

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...

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...

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?

Which of the following is NOT backed up when performing a Docker Trusted backup operation?

Which statement is true?