String comparison (-like, -match) in PowerShell - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does the PowerShell operator -like do?

The -like operator checks if a string matches a pattern using wildcard characters like * and ?. It returns True if the pattern matches part or all of the string.

intermediate

How does the -match operator differ from -like in PowerShell?

-match uses regular expressions to compare strings, allowing more complex pattern matching than -like, which uses simple wildcards.

beginner

Example: What is the result of 'hello' -like 'h*o'?

It returns True because the pattern h*o matches any string starting with 'h' and ending with 'o', including 'hello'.

intermediate

Example: What does 'hello' -match '^h.*o$' return?

It returns True because the regular expression ^h.*o$ means the string starts with 'h' and ends with 'o', matching 'hello'.

advanced

Can -match capture parts of a string? How?

Yes, -match can capture parts using parentheses in the regex. Captured groups are stored in the automatic variable $matches.

Which operator uses wildcard characters like * and ? for string comparison in PowerShell?

A -match

B -contains

C -eq

D -like

-like uses wildcards like * and ? for simple pattern matching.

What does the -match operator use to compare strings?

A Regular expressions

B Exact equality

C Wildcards

D Numeric comparison

-match uses regular expressions for flexible pattern matching.

What will 'PowerShell' -like 'P*Shell' return?

A False

B True

C Error

D Null

The pattern matches because it starts with 'P' and ends with 'Shell'.

Which variable holds captured groups after a successful -match operation?

A $matches

B $groups

C $result

D $capture

Captured groups are stored in the automatic variable $matches.

Which operator would you use to check if a string exactly equals another string?

A -like

B -match

C -eq

D -contains

-eq checks for exact equality, not pattern matching.

Explain the difference between the PowerShell operators -like and -match.

Think about simple vs complex pattern matching.

Describe how to capture parts of a string using the -match operator in PowerShell.

Remember $matches is automatic after -match.