Adaface Sample Jenkins Questions

You are given a Jenkinsfile for a pipeline that builds, tests, and deploys an application. The pipeline has multiple stages, and you need to optimize it by ensuring certain stages are executed only under specific conditions. The current Jenkinsfile looks like this:

Your task is to modify the Jenkinsfile so that:
            
            1. The 'Test' stage is executed only if the 'Build' stage is successful.
            2. The 'Deploy' stage is executed only for builds triggered by commits to the 'master' branch.
            3. All stages should always run for scheduled nightly builds regardless of the branch.
            
            Which of the following modifications to the Jenkinsfile will meet these requirements?

A Jenkins multibranch pipeline is configured to build projects from a version control system (VCS) with multiple branches. The pipeline is set up with specific build strategies to optimize resource usage and build times. The Jenkins administrator needs to ensure that the pipeline:
            
            1. Automatically triggers builds for the 'master' and 'develop' branches upon new commits.
            2. Does not automatically build feature branches but allows manual builds.
            3. Automatically builds a branch if it has a pull request open with the 'master' branch.
            
            Which combination of build strategies and configurations should the Jenkins administrator use?

A: Enable SCM polling, add a regular expression to include 'master' and 'develop', and use the Pull Request build strategy.
            B: Use the Discover Branches strategy with filters for 'master' and 'develop', and the Pull Request build strategy with a target branch filter for 'master'.
            C: Enable SCM polling with a cron expression, use a script to exclude feature branches, and add a webhook for pull request events.
            D: Use the Discover Branches strategy, add a regular expression to exclude feature branches, and enable webhooks for pull request events.
            E: Enable SCM polling for all branches, use the Discover Tags strategy, and add a post-receive hook in VCS for 'master' and 'develop'.
            F: Use the Discover Branches strategy for all branches, add a property to manually trigger builds for feature branches, and use the Pull Request build strategy.

Consider a Jenkins Pipeline which includes a Jenkinsfile with an embedded Python script. The pipeline is designed for a multi-stage build process. The Python script is responsible for performing certain operations based on the current Jenkins build status. Analyze the following Jenkinsfile pseudo-code snippet:

The pipeline sets an environment variable `BUILD_STATUS` which can have values 'SUCCESS', 'FAILURE', or 'UNSTABLE'. What will be the output and the exit status of the Python script when `BUILD_STATUS` is set to 'UNSTABLE'?