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A. If you are running Jenkins under an HTTP proxy, you must configure HTTP proxy access for the plugin manager before Installing or updating plugins.

B. If you check the "Enable rollbacks when upgrading" box, future updates to an the plugin can easily be rolled back when necessary.

C. The previous public release of a plugin is installed for reliability instead of Installing the most recent public release.

D. You must install all required and optional dependencies before Installing the plugin with the plugin manager.

E. Most plugins can be Installed without stopping and starting Jenkins.

A. Git

B. Subversion

C. Java

D. Perforce

E. Maven

A. Configure credentials

B. Manage plugins

C. Configure Global Security

D. Open Blue Ocean

E. Define views

A. If an environment variable b enclosed In single quotes, the Pipeline DSL dereferences the variable on the master's JVM and passes the calculated string to the sh or bat step; if the environment variable Is enclosed in double quotes, the name of the environment variable itself is passed to the "sh" or 'bat" step and the shell interpreter on the agent dereferences the variable.

B. An environment variable can be specified globally (to apply to all steps in the pipeline), for an individual step, or for one or more specified steps In the Pipeline,

C. A Declarative Pipeline can use environment variables defined In Jenkins Itself (such as BUILD_NUMBER and JENKINS^URL), environment variables defined in an installed plugin (such as GIT„COMMIT or GIT .BRANCH, defined in the Git plugin), or environment variables that are coded as directives in the Pipeline itself; the semantics are identical for all environment variables.

D. If an environment variable Is enclosed In double quotes, the Pipeline DSL dereferences the variable on the master's JVM and passes the calculated string to the sh or bat step; if the environment variable is enclosed in single quotes, the name of the environment variable itself is passed to the "sh" or "bat" step and the shell interpreter on the agent dereferences the variable.

A. Automate only when necessary

B. Making sure a manager approves every line of code

C. Fixing broken builds

A. Gradle

B. Docker

C. Excel

D. Ant

A. Create a separate Pipeline to run the deploy stage.

B. This is not possible using Pipeline, because a Pipeline must run from start to finish without human interaction.

C. Use an input step just before the deploy stage.

D. Use a stage step just before the deploy stage.

A. prepares a test environment in Jenkins

B. can be used to group a number of other steps into a logical unit for display

C. collects a set of artifacts that can be referenced in a later Pipeline step

D. transfers artifacts to a staging server for testing