Pass the LPI DevOps Tools Engineer 701-100 Questions and answers with ExamsMirror

B. Jenkins supports a master-slave architecture where the master node distributes build tasks to multiple slave nodes, thereby improving performance and enabling load balancing.

D. Jenkins is highly extensible through plugins. Its functionality can be significantly enhanced by installing various plugins that support different tools, languages, and activities such as building, deploying, and automating tasks.

References:

Jenkins Distributed Builds

Jenkins Plugins

The command git checkout -- index.php is used to revert changes made to a file in your working directory. It replaces the local changes with the content of the file as it exists in the latest commit of the current branch. This is useful when you want to discard local changes that have not been committed yet.

References: Git Documentation - git checkout

Reference https://www.ibm.com/developerworks/library/mw-1608-tost-trs/index.html

When retrieving a Docker container image from a registry, Docker pulls multiple layers that make up the image. Each layer represents a set of filesystem changes or additions, and these layers are stacked on top of each other to form the complete image.

References: Docker Documentation - Images

Docker automatically assigns names to containers using a combination of an adjective and a famous scientist's or hacker's name (e.g., clever_ritchie). This naming convention is used to make container names more human-readable and memorable.

References: Docker Documentation - Container Naming

Vagrant is a tool for building and managing virtual machine environments in a single workflow. It uses a concept called providers to manage the virtual environments. Providers are responsible for creating and managing the virtual machines. Some common providers include VirtualBox, VMware, and AWS.

Providers: Vagrant relies on external hypervisors (providers) to run virtual machines. For example, VirtualBox can be used as a provider, and Vagrant will interact with VirtualBox to create, configure, and manage the virtual machines.

A: There is no vagrant-specific hypervisor called VagrantVM.

B: Vagrant itself does not need to run within a virtual machine not controlled by Vagrant.

C: Vagrant does not ship with an embedded version of VirtualBox; it relies on installed providers.

E: Vagrant does provide mechanisms to run virtual machines using providers.

References:

Vagrant Documentation - Providers

Service discovery is crucial in container environments to enable containers to find and communicate with each other. The common mechanisms for service discovery in container platforms include:

Environment Variables: Container platforms often set environment variables within containers to provide information about services. This method is simple and allows containers to access necessary details without additional configuration.

DNS Records: Many container platforms maintain DNS records that map service names to container IP addresses. This allows services to be discovered and accessed using standard DNS queries, which is a scalable and widely used approach.

The other options are not standard methods for service discovery:

A: There is no docker service discover command for service discovery.

C: Listing localhost ports in /etc/services is not a typical method used by container platforms.

D: Mounting sockets for all services into containers’ file systems is not a common practice for service discovery.

References:

Docker Documentation - Service Discovery

Kubernetes Documentation - Service Discovery

The knife command-line tool is used to interact with a Chef server. The knife cookbook list command lists all cookbooks available on the Chef server, allowing users to see which cookbooks are available for use.

References: Chef Documentation - Knife

In Kubernetes, the highest level of the definition of every object includes elements like apiVersion, kind, and metadata. The metadata element is used to define the unique attributes of the object, such as its name, namespace, labels, and annotations.

References: Kubernetes Documentation - Object Management

A. The output of git status shows changed files that have not yet been staged for the next commit.

C. It also shows files that have been staged and will be part of the next commit.

E. Additionally, it lists untracked files which are not currently under version control.

References: Git Documentation - git status

In Docker, if you reference an image without specifying a tag, Docker assumes the tag to be latest. The latest tag is used as the default tag for the most recent stable version of the image.

References:

Docker Documentation - Images