Groovy methods in pipelines in Jenkins - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a simple Groovy method in a Jenkins pipeline.

Jenkins

def greet() {
    echo [1] 
}

Drag options to blanks, or click blank then click option'

Aprintln "Hello, Jenkins!"

BHello, Jenkins!

C"Hello, Jenkins!"

Decho "Hello, Jenkins!"

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting quotes around the string

Using println instead of echo in Jenkins pipeline

The echo step requires a string argument. The string must be quoted.

2fill in blank

medium

Complete the code to call the method greet inside the pipeline script.

Jenkins

pipeline {
    agent any
    stages {
        stage('Say Hello') {
            steps {
                [1]()
            }
        }
    }
}

Drag options to blanks, or click blank then click option'

Aecho

Bprint

CsayHello

Dgreet

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different method name

Forgetting parentheses when calling the method

The method defined is named greet, so calling greet() runs it.

3fill in blank

hard

Fix the error in the method definition to accept a parameter name and print a greeting.

Jenkins

def greet([1]) {
    echo "Hello, ${name}!"
}

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AString name

Bname String

Cdef name

Dname

Attempts:

3 left

💡 Hint

Common Mistakes

Reversing parameter type and name

Omitting the type when required

Groovy method parameters need the type before the name, like String name.

4fill in blank

hard

Fill both blanks to define a method that returns the length of a string parameter.

Jenkins

def getLength([1]) {
    return [2].length()
}

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AString text

Btext

CString name

Dname

Attempts:

3 left

💡 Hint

Common Mistakes

Using a parameter name that doesn't match inside the method

Forgetting to specify the parameter type

The method parameter is String text, and we call text.length() to get its length.

5fill in blank

hard

Fill all three blanks to create a method that filters a list of strings, returning only those longer than 3 characters.

Jenkins

def filterLong([1]) {
    return [2].findAll { it [3] 3 }
}

Drag options to blanks, or click blank then click option'

AList<String> words

Bwords

C.length() >

D.size() >

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong parameter type

Using size() instead of length() on strings

Mismatching parameter name inside the method

The method takes a list of strings named words. We use findAll to keep items where it.length() > 3.