match operator in PowerShell - Practice Problems & Coding Challenges

Challenge - 5 Problems

💻 Command Output

intermediate

What is the output of this PowerShell match operator example?

Consider the following PowerShell code snippet using the match operator. What will be the output?

PowerShell

switch -Regex ($input = 'PowerShell 7.2') {
  'PowerShell' { 'Found PowerShell' }
  '\d+\.\d+' { 'Found version number' }
  default { 'No match' }
}

A Found PowerShell

B PowerShell 7.2

C No match

D Found version number

💡 Hint

The switch statement with -Regex checks patterns in order and stops at the first match.

The switch statement with -Regex checks each pattern in order. The first pattern 'PowerShell' matches the input string, so it outputs 'Found PowerShell' and stops checking further patterns.

💻 Command Output

intermediate

What does this PowerShell match operator return?

What is the output of this PowerShell command using the match operator?

PowerShell

'Hello World' -match 'world'

A true

B world

C Hello World

D false

💡 Hint

The match operator is case-sensitive by default.

The match operator is case-sensitive, so 'world' does not match 'World'. Therefore, the result is false.

📝 Syntax

advanced

Which option correctly uses the match operator to find all digits in a string?

Select the PowerShell command that correctly uses the match operator to extract all digits from the string 'abc123def456'.

A 'abc123def456' -match '\d+'

B 'abc123def456' -match '\d+' -AllMatches

C 'abc123def456' -match '\d+' -AllMatches | ForEach-Object { $_.Matches }

D 'abc123def456' -match '\d+' | Select-String -AllMatches

💡 Hint

The -match operator returns a boolean by default; to get all matches, use the $Matches automatic variable with -AllMatches.

Option C correctly uses -match with -AllMatches and processes the Matches collection to extract all digit sequences. Option C returns only a boolean. Option C is invalid syntax. Option C misuses Select-String.

🔧 Debug

advanced

Why does this PowerShell match operator code fail to find a match?

Given the code below, why does the match operator fail to find 'test' in the string?

PowerShell

$string = 'This is a Test string'
$result = $string -match 'test'
$result

A Because the string variable is not properly assigned

B Because the match operator is case-sensitive and 'test' does not match 'Test'

C Because the match operator requires the pattern to be in double quotes

D Because the match operator only works with arrays

💡 Hint

Check if the match operator is case-sensitive by default.

The match operator is case-sensitive by default, so 'test' does not match 'Test'. To match ignoring case, use -imatch instead.

🚀 Application

expert

How to extract all words starting with 'a' or 'A' using PowerShell match operator?

You want to extract all words from the string 'An apple a day keeps the doctor away' that start with 'a' or 'A'. Which PowerShell code correctly does this?

A $string = 'An apple a day keeps the doctor away'; $string -match '\b[aA]\w*\b' -AllMatches; $Matches.Matches | ForEach-Object { $_.Value }

B $matches = 'An apple a day keeps the doctor away' -match '\b[aA]\w*\b' -AllMatches; $matches.Matches.Value

C 'An apple a day keeps the doctor away' -match '\b[aA]\w*\b' -AllMatches | ForEach-Object { $_.Matches.Value }

D 'An apple a day keeps the doctor away' -imatch '\b[a]\w*\b' | Select-Object -ExpandProperty Matches

💡 Hint

Remember that -match returns a boolean, but with -AllMatches you can access $Matches automatic variable.

Option A correctly uses -match with -AllMatches on the string variable, then accesses the automatic $Matches variable's Matches collection to extract all matching words. Option A tries to pipe the boolean result, which fails. Option A assigns the boolean to $matches, not the automatic variable. Option A misuses -imatch and Select-Object.