Free Practice Questions for LPI 701-100 Exam

The docker-compose down command is used to stop and remove containers, networks, volumes, and images created by docker-compose up. By default, it only removes the containers and networks, but with additional parameters, it can also remove volumes.

A. Delete all volumes defined in the compose file: Using the --volumes flag with docker-compose down will remove the volumes declared in the volumes section of the compose file.

B. Delete all containers defined in the compose file: By default, docker-compose down removes the containers defined in the compose file.

The other options are incorrect:

C: Networks are deleted by default without additional parameters.

D: Images are not removed by default; docker-compose down does not remove images from Docker nodes.

E: Images built from the compose file are not deleted from their registry; docker-compose down does not handle registry interactions.

References:

Docker Compose Documentation - down

Reference https://www.vagrantup.com/docs/boxes/base.html

A. Many publicly available Vagrant boxes are configured to allow SSH logins for the user vagrant with the password vagrant, which poses a security risk.

B. They also typically allow SSH logins using a default, publicly available SSH key pair for the user vagrant.

C. The vagrant user is often configured to use sudo without requiring a password, granting root privileges easily, which can be exploited if unauthorized access is gained.

References:

Vagrant Documentation - Boxes

Vagrant Security Model

In Docker, the run subcommand is used to create and start a new container from an image. The full command typically includes the image name and any additional parameters needed to configure the container.

References:

Docker Documentation - run

In Puppet, the equivalent of an Ansible Playbook is called a Manifest. Manifests are files containing Puppet code that define the desired state of a system. These manifests use the .pp file extension and are written in the Puppet language.

Puppet Manifest: This is the correct term for a file that contains the desired configuration state for managed nodes in Puppet.

The other options do not accurately represent the concept:

Puppet Catalog: This is a compiled version of the manifest, containing all the resources and their dependencies.

Puppet Playbook, Puppet Factsheet, and Puppet Declaration are not terms used to describe the configuration files in Puppet.

References:

Puppet Documentation - Manifests

A. The apt module in Ansible can be used to ensure that an installed package is updated to the latest version.

B. It can also be used to update the list of available packages from the configured repositories using the update_cache parameter.

References: Ansible Documentation - apt module

Cloud-init is a tool used to initialize cloud instances and configure them on first boot. It integrates with the managed system by providing systemd units that are activated at different stages of the boot process to handle various initialization tasks.

systemd units: Cloud-init provides several systemd service units which are included in the boot process. These units handle the early initialization, configuration, and final setup stages.

The other options are incorrect:

A: There is no cloud-init-worker command.

C: Cloud-init does not replace the instance’s original init system.

D: Cloud-init does not provide a Linux kernel module.

E: There is no cloud-init-daemon service that keeps the instance in sync with the desired configuration.

References:

Cloud-Init Documentation - Systemd

Agile software development methodologies prioritize flexibility and adaptability over strict adherence to plans. They encourage self-organizing teams and flexible processes to quickly respond to change and deliver value incrementally.

Self-organization: Teams are empowered to organize their work and make decisions collaboratively without heavy-handed management.

Flexibility: Agile methodologies advocate for adapting processes and plans as necessary to meet the needs of the project and stakeholders.

References:

Agile Manifesto

Principles behind the Agile Manifesto

The command docker service create --name myweb --network webnet --mode global nginx creates a Docker Swarm service named myweb using the nginx image. The --mode global option specifies that the service should run exactly once on each node in the Swarm cluster.

Global Mode: When a service is created in global mode, Docker Swarm ensures that exactly one instance of the service runs on each node. This is useful for tasks that should run on all nodes, such as monitoring agents.

The other options are incorrect:

A: It does not run exactly one time in the Swarm; it runs once on each node.

C: This describes the replicated mode, not the global mode.

D: The service runs on all nodes, not just those providing the webnet network.

E: There is no network type called global.

References:

Docker Documentation - Service Create

Docker Documentation - Swarm Services

For containers to communicate across different Docker nodes, they need to be part of a network that supports multi-host networking. The bridge network driver is limited to a single host.

C. Start the containers on the same node: If both containers are started on the same Docker node, they can communicate using the bridged network.

E. Use an overlay network instead of a bridged network: Overlay networks are designed for multi-host communication and allow containers on different Docker nodes to communicate with each other.

The other options are incorrect:

A: Using a host network removes network isolation but does not help with multi-host container communication.

B: There is no --inter-container option for the docker network create command.

D: --network=isolated_nw,nofence is not a valid parameter for Docker network settings.

References:

Docker Documentation - Networking overview

Docker Documentation - Overlay networks