What is the purpose of a .dockerignore file?

It specifies files that Docker does not submit to the Docker daemon when building a Docker image

It lists files existing in a Docker image which should be excluded when building a derivative image.

It specifies files that Docker does not submit to the Docker daemon when building a Docker image

It exists in the root file system of containers that should ignore volumes and ports provided by Docker.

It must be placed in the top level directory of volumes that Docker should never attach automatically to a container

It specifies which parts of a Dockerfile should be ignored when building a Docker image.

Which file format is used by libvirt to store configuration data?

Text files containing key/value pairs

Which of the following statements is true regarding the following output of xl list:

Ubuntu is idle or waiting for I/O.

Both Debian and Ubuntu require xl commands to start running.

The domain with ID 2 uses Para virtualization.

CentOS is the domain which has consumed the most CPU time.

Ubuntu is idle or waiting for I/O.

It is necessary to use the xl command to change Ubuntu's state to running.

What is true about containerd?

It uses rune to start containers on a container host.

It is a text file format defining the build process of containers.

It runs in each Docker container and provides DHCP client functionality

It uses rune to start containers on a container host.

It is the initial process run at the start of any Docker container.

It requires the Docker engine and Docker CLI to be installed.

Which of the following resources can be limited by libvirt for a KVM domain? (Choose two.)

File systems allowed in the domain

If a Dockerfile contains the following lines:WORKDIR /RUN cd /tmpRUN echo test > testwhere is the file test located?

/test within the container image.

/ting/test within the container image.

/root/tesc within the container image.

/test within the container image.

/tmp/test on the system running docker build.

test in the directory holding the Dockerf ile.

Which of the following commands boots a QEMU virtual machine using hardware virtualization extensions?

qemu -accel kvm -drive file-debian.img -cdrom debian.iso -m 1024 -boot d

qvirt -create -drive file=debian.img -cdrom debian.iso -m 1024 -boot d -driver hvm

vm -kvm -drive file=debian.img -cdrom debian.iso -m 1024 -boot d

qemu-hw -create -drive file=debian.img -cdrom debian.iso -m 1024 -boot d

qemu -accel kvm -drive file-debian.img -cdrom debian.iso -m 1024 -boot d

qvm start -vmx -drive file=debian.img -cdrom debian.iso -m 1024 -boot d

Which of the following tasks are part of a hypervisor's responsibility? (Choose two.)

Map the resources of virtual machines to the resources of the host system.

Isolate the virtual machines and prevent unauthorized access to resources of other virtual machines.

Create filesystems during the installation of new virtual machine quest operating systems.

Provide host-wide unique PIDs to the processes running inside the virtual machines in order to ease inter-process communication between virtual machines.

Map the resources of virtual machines to the resources of the host system.

Manage authentication to network services running inside a virtual machine.

Isolate the virtual machines and prevent unauthorized access to resources of other virtual machines.

Which of the following statements is true regarding networking with libvirt?

Libvirt networks appear, by default, as standard Linux bridges in the host system.

Libvirt's network functionality is limited to connecting virtual machines to a physical network interface of the host system.

Libvirt assiqns the same MAC address to all virtual machines and isolates their network interfaces at the link layer.

Libvirt networks appear, by default, as standard Linux bridges in the host system.

Libvirt requires a dedicated network interface that may not be used by the host system.

Libvirt supports exactly one virtual network and connects all virtual machines to it.

Which of the following are true regarding the CPU of a QEMU virtual machine? (Choose two.)

The CPU architecture of a QEMU virtual machine is independent of the host system's architecture.

QEMU virtual machines support multiple virtual CPUs in order to run SMP systems.

The CPU architecture of a QEMU virtual machine is independent of the host system's architecture.

Each QEMU virtual machine can only have one CPU with one core.

For each QEMU virtual machine, one dedicated physical CPU core must be reserved.

QEMU uses the concept of virtual CPUs to map the virtual machines to physical CPUs.

QEMU virtual machines support multiple virtual CPUs in order to run SMP systems.

Which of the following statements about the command lxc-checkpoint is correct?

It writes the status of the container to a file.

It creates a clone of a container.

It doubles the memory consumption of the container.

It only works on stopped containers.

It writes the status of the container to a file.

It creates a container image based on an existing container.

The command virsh vol-list vms returns the following error:error: failed to get pool 'vms'error: Storage pool not found: no storage pool with matching name 'vms 'Given that the directory /vms exists, which of the following commands resolves this issue?

virsh pool-create-as vms dir --target /vms

dd if=/dev/zero of=/vms bs=1 count=0 flags=name:vms

libvirt-poolctl new ---name=/vms ---type=dir ---path=/vms

virsh pool-create-as vms dir --target /vms

What is the purpose of the command vagrant init?

It creates a Vagrant configuration file.

It executes a provisioning tool in a running box.

It creates a Vagrant configuration file.

It installs Vagrant on a Linux host.

In order to use the option dom0_mem to limit the amount of memory assigned to the Xen Domain-0, where must this option be specified?

In the bootloader configuration, when Xen is booted.

In any of Xen's global configuration files.

In its .config file, when the Domain-0 kernel is built.

In the configuration file /etc/xen/Domain-0.cfg, when Xen starts.

In its Makefile, when Xen is built.

Which functionality is provided by Vagrant as well as by Docker? (Choose three.)

Both can share directories from the host file system to a guest.

Both can download required base images.

Both can apply changes to a base image.

Both can share directories from the host file system to a guest.

Both start system images as containers instead of virtual machines by default.

Both can download required base images.

Both can apply changes to a base image.

Both start system images as virtual machines instead of containers bv default.

In an IaaS cloud, what is a common method for provisioning new computing instances with an operating system and software?

Each new instance is created based on an image file that contains the operating system as well as software and default configuration for a given purpose.

Each new instance is connected to the installation media of a Linux distribution and provides access to the installer by logging in via SSH.

Each new instance is created based on an image file that contains the operating system as well as software and default configuration for a given purpose.

Each new instance is a clone of another currently running instance that includes all the software, data and state of the original instance.

Each new instance is connected via a VPN with the computer that started the provisioning and tries to PXE boot from that machine.

Each new instance contains a minimal live system running from a virtual CD as the basis from which the administrator deploys the target operating system.

What is the purpose of cloud-init?

Prepare the generic image of an laaS instance to fit a specific instance's configuration.

Replace common Linux inic systems, such as systemd or SysV init.

Assign an laaS instance to a specific computing node within a cloud.

Standardize the configuration of infrastructure services, such as load balancers or virtual firewalls in a cloud.

Orchestrate the creation and start of multiple related laaS instances.

Prepare the generic image of an laaS instance to fit a specific instance's configuration.

What is the purpose of the packer inspect subcommand?

Display an overview of the configuration contained in a Packer template.

Retrieve files from an existing Packer image.

Execute commands within a running instance of a Packer image.

List the artifacts created during the build process of a Packer image.

Show usage statistics of a Packer image.

Display an overview of the configuration contained in a Packer template.

What is the purpose of capabilities in the context of container virtualization?

Prevent processes from performing actions which might infringe the container.

Map potentially dangerous system calls to an emulation layer provided by the container virtualization.

Restrict the disk space a container can consume.

Enable memory deduplication to cache files which exist in multiple containers.

Allow regular users to start containers with elevated permissions.

Prevent processes from performing actions which might infringe the container.

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

Different containers may use different distributions of the same operating system.

All containers run within the operating system kernel of the host system.

Each container runs its own operating system kernel.

Different containers may use different distributions of the same operating system.

Container-based virtualization relies on hardware support from the host system's CPU.

All containers run within the operating system kernel of the host system.

Linux does not support container-based virtualization because of missing kernel APIs.

How does Packer interact with system images?

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.

Packer has to be installed within the target image and is executed during the image's first boot in order to execute preparation tasks.

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.

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.

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.

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/truehow is an additional new container started which shares the /data volume with the datastore container?

docker run --volumes-from datastore --name service debian bash

docker run --share-with datastore --name service debian bash

docker run -v datastore:/data --name service debian bash

docker run --volumes-from datastore --name service debian bash

docker run -v /data --name service debian bash

docker run --volume-backend datastore -v /data --name service debian bash

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

Both containers share the contents of the data volume, have full permissions to alter its content and mutually see their respective changes.

The container resulting from the second invocation can only read the content of /data/ and cannot change it.

Each container is equipped with its own independent data volume, available at /data/ in the respective container.

Both containers share the contents of the data volume, have full permissions to alter its content and mutually see their respective changes.

The original content of the container image data is available in both containers, although changes stay local within each container.

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?

Run containers on the worker nodes according to the Kubernetes configuration.

Provide a command line interface to manage Kubernetes.

Build a container image as specified in a Dockerfile.

Manage permissions of users when interacting with the Kubernetes API.

Run containers on the worker nodes according to the Kubernetes configuration.

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?

docker stack instructs the Swarm nodes to pull the images from a registry, although it does not upload the images to the registry.

docker stack builds the images locally and copies them to only those Swarm nodes which run the service.

docker stack passes the images to the Swarm master which distributes the images to all other Swarm nodes.

docker stack instructs the Swarm nodes to pull the images from a registry, although it does not upload the images to the registry.

docker stack transfers the image from its local Docker cache to each Swarm node.

docker stack triggers the build process for the images on all nodes of the Swarm.

Which of the following statements in a Dockerfile leads to a container which outputs hello world? (Choose two.)

ENTRYPOINT [ 'echo hello world' ]

ENTRYPOINT [ 'echo', 'hello', 'world' ]

ENTRYPOINT [ 'echo hello world' ]

ENTRYPOINT [ 'echo', 'hello', 'world' ]

ENTRYPOINT 'echo', 'Hello', 'World*

LPI 305-300 Practice Test 1 - Free Online Exam Prep & Questions

Which CPU flag indicates the hardware virtualization capability on an AMD CPU?

A.

HVM

B.

VIRT

C.

SVM

D.

PVM

E.

VMX

LPI 305-300 Practice Test 1

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LPI 305-300 Practice Tests

Practice Tests