A Jenkins Declarative Pipeline contains the following stage:

stage('Build') {
    when {
        branch 'main'
    }
    steps {
        sh 'make build'
    }
}

The pipeline is triggered by a commit pushed to the feature/login branch. What will Jenkins do?

Consider this pipeline snippet:

pipeline {
    agent none

    stages {
        stage('Test') {
            agent any
            steps {
                sh 'run-tests.sh'
            }
        }
    }
}

What is the primary effect of agent none at the pipeline level?

Two parallel stages run on the same agent node:

parallel {
    stage('A') {
        steps {
            sh 'echo A > file.txt'
        }
    }
    stage('B') {
        steps {
            sh 'cat file.txt'
        }
    }
}

What is the most likely outcome?

A pipeline uses a shared library:

@Library('devops-lib@release') _

What does @release represent?

Consider the following code:

stage('Deploy') {
    steps {
        script {
            try {
                sh 'deploy.sh'
            } catch (err) {
                currentBuild.result = 'UNSTABLE'
            }
        }
    }
}

If deploy.sh fails, what will happen?