String comparison (-like, -match) in PowerShell - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check if the variable $name contains the letter 'a' using the -like operator.

PowerShell

$name = "Sarah"
if ($name [1] "*a*") {
    Write-Output "Contains 'a'"
}

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

A-contains

B-like

C-eq

D-match

Attempts:

3 left

💡 Hint

Common Mistakes

Using -eq which checks exact equality.

Using -contains which is for collections, not strings.

The -like operator uses wildcard patterns to check if a string matches. Here, *a* means any string containing 'a'.

2fill in blank

medium

Complete the code to check if the variable $text matches the regex pattern for digits using the -match operator.

PowerShell

$text = "Order123"
if ($text [1] '\d+') {
    Write-Output "Contains digits"
}

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

A-match

B-like

C-eq

D-contains

Attempts:

3 left

💡 Hint

Common Mistakes

Using -like which does not support regex.

Using -eq which checks exact equality.

The -match operator uses regular expressions to check patterns. Here, \d+ matches one or more digits.

3fill in blank

hard

Fix the error in the code to correctly check if $filename ends with '.txt' using -like.

PowerShell

$filename = "report.doc"
if ($filename [1] "*.txt") {
    Write-Output "Text file"
} else {
    Write-Output "Not a text file"
}

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

A-contains

B-eq

C-match

D-like

Attempts:

3 left

💡 Hint

Common Mistakes

Using -eq which requires exact match.

Using -match which expects regex, but pattern is wildcard.

The -like operator with the pattern *.txt checks if the string ends with '.txt'.

4fill in blank

hard

Fill both blanks to create a dictionary of words and their lengths, but only include words longer than 4 characters.

PowerShell

$words = @('apple', 'cat', 'banana', 'dog')
$lengths = $words | ForEach-Object { $word = $_; @{ [1] = [2] } } | Where-Object { $_.Value -gt 4 }

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

A'word'

B'length'

C$word

D$word.Length

Attempts:

3 left

💡 Hint

Common Mistakes

Using string literals instead of variables for keys or values.

Not using the Length property to get word length.

We create a dictionary with keys as words ($word) and values as their lengths ($word.Length), then filter for lengths greater than 4.

5fill in blank

hard

Fill all three blanks to create a hashtable of uppercase words and their lengths, including only words with length greater than 3.

PowerShell

$words = @('tree', 'sun', 'flower', 'sky')
$result = $words | ForEach-Object { $word = $_; @{ [1] = [2] } } | Where-Object { [3] }

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

A$word.ToUpper()

B$word.Length

C$word.Length -gt 3

D$word

Attempts:

3 left

💡 Hint

Common Mistakes

Using original words instead of uppercase for keys.

Not filtering correctly by length.

Keys are uppercase words ($word.ToUpper()), values are lengths ($word.Length), and filter keeps words longer than 3 characters ($word.Length -gt 3).