Regular expressions with -match in PowerShell - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check if the string contains the word 'cat'.

PowerShell

$text = 'The cat is sleeping.'
if ($text [1] 'cat') {
    Write-Output 'Found a cat!'
}

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

A-contains

B-match

C-like

D-eq

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-contains' which is for collections, not strings.

Using '-eq' which checks for exact equality.

The '-match' operator checks if the string matches the regular expression pattern.

2fill in blank

medium

Complete the code to check if the string starts with a digit using a regular expression.

PowerShell

$text = '3 cats'
if ($text [1] '^[0-9]') {
    Write-Output 'Starts with a digit'
}

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

A-like

B-eq

C-match

D-contains

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-like' which does not support full regex.

Using '-contains' which is for collections.

The '-match' operator supports regex patterns like '^[0-9]' to check the start of the string.

3fill in blank

hard

Fix the error in the code to check if the string ends with '.txt'.

PowerShell

$filename = 'document.txt'
if ($filename [1] '\.txt$') {
    Write-Output 'Text file detected'
}

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

A-like

B-eq

C-contains

D-match

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-like' which does not support regex anchors like '$'.

Using '-eq' which checks exact equality.

The '-match' operator is needed to use regex patterns like '\.txt$' to check the string ending.

4fill in blank

hard

Fill both blanks to create a regex that matches strings with exactly 3 digits.

PowerShell

$input = '123'
if ($input [1] '^[0-9][2]$') {
    Write-Output 'Exactly three digits'
}

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

A-match

B-like

C{3}

D{2}

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-like' which does not support regex quantifiers.

Using '{2}' which matches exactly two digits.

Use '-match' for regex matching and '{3}' to specify exactly three digits.

5fill in blank

hard

Fill all three blanks to create a regex that matches strings starting with 'a' or 'b' followed by one or more digits.

PowerShell

$text = 'a123'
if ($text [1] '^[[2]][0-9][3]$') {
    Write-Output 'Match found'
}

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

A-match

Bab

C+

D*

Attempts:

3 left

💡 Hint

Common Mistakes

Using '*' which means zero or more, not one or more.

Using '-like' which does not support regex.

Use '-match' for regex, '[ab]' to match 'a' or 'b', and '+' to match one or more digits.