LPI 305-300 practice test

Which of the following statements are true about container-based virtualization? (Choose two.)

• A. Each container runs its own operating system kernel.
• B. Different containers may use different distributions of the same operating system.
• C. Container-based virtualization relies on hardware support from the host system's CPU.
• D. All containers run within the operating system kernel of the host system.
• E. Linux does not support container-based virtualization because of missing kernel APIs.

How does Packer interact with system images?

• A. Packer has to be installed within the target image and is executed during the image's first boot in order to execute preparation tasks.
• B. Packer installs a client within the image which has to be run periodically via cron in order to retrieve the latest template from the Packer server and apply it locally.
• C. Packer periodically connects through the network to the Packer daemons of all running Packer images in order to re-apply the whole template to the running instance.
• D. Packer downloads and extracts an image in order to make changes to the image's file system, repack the modified image and upload it again.
• E. Packer creates an instance based on a source image, prepares the instance through a network connection and bundles the resulting instance as a new system image.

After setting up a data container using the following command:
docker create -v /data --name datastore debian /bin/true
how is an additional new container started which shares the /data volume with the datastore
container?

• A. docker run --share-with datastore --name service debian bash
• B. docker run -v datastore:/data --name service debian bash
• C. docker run --volumes-from datastore --name service debian bash
• D. docker run -v /data --name service debian bash
• E. docker run --volume-backend datastore -v /data --name service debian bash

After creating a new Docker network using the following command:
docker network create --driver bridge isolated_nw
which parameter must be added to docker create in order to attach a container to the network?

• A. --eth0=isolated_nw
• B. --alias=isolated_nw
• C. --ethernet=isolated_nw
• D. --network=isolated_nw
• E. --attach=isolated_nw

FILL BLANK
What LXC command lists containers sorted by their CPU, block I/O or memory consumption? (Specify
ONLY the command without any path or parameters.)

Which of the following network interface types are valid in an LXD container configuration? (Choose
three.)

• A. ipsec
• B. macvlan
• C. bridged
• D. physical
• E. wifi

What happens when the following command is executed twice in succession?
docker run -tid -v data:/data debian bash

• A. The container resulting from the second invocation can only read the content of /data/ and cannot change it.
• B. Each container is equipped with its own independent data volume, available at /data/ in the respective container.
• C. Both containers share the contents of the data volume, have full permissions to alter its content and mutually see their respective changes.
• D. The original content of the container image data is available in both containers, although changes stay local within each container.
• E. The second command invocation fails with an error stating that the volume data is already associated with a running container.

What is the purpose of the kubelet service in Kubernetes?

• A. Provide a command line interface to manage Kubernetes.
• B. Build a container image as specified in a Dockerfile.
• C. Manage permissions of users when interacting with the Kubernetes API.
• D. Run containers on the worker nodes according to the Kubernetes configuration.
• E. Store and replicate Kubernetes configuration data.

If docker stack is to be used to run a Docker Compose file on a Docker Swarm, how are the images
referenced in the Docker Compose configuration made available on the Swarm nodes?

• A. docker stack builds the images locally and copies them to only those Swarm nodes which run the service.
• B. docker stack passes the images to the Swarm master which distributes the images to all other Swarm nodes.
• C. docker stack instructs the Swarm nodes to pull the images from a registry, although it does not upload the images to the registry.
• D. docker stack transfers the image from its local Docker cache to each Swarm node.
• E. docker stack triggers the build process for the images on all nodes of the Swarm.

FILL BLANK
What LXC command starts a new process within a running LXC container? (Specify ONLY the
command without any path or parameters.)