Which PowerShell cmdlet is used to search for strings or regular expressions inside files and command output, similar to grep?

• A. Get-Help
• B. Get-Command
• C. Select-String
• D. ForEach-Object

Answer: (C)

Searching text with patterns across files or command output is what this concept tests. The best tool is Select-String, which natively searches streams or files for strings or regular expressions and returns the matching lines. It works like grep in PowerShell, letting you specify a regex with -Pattern and target files with -Path or feed input via the pipeline. For example, Get-Content application.log | Select-String -Pattern 'timeout|failed' will show lines containing either term, and Select-String -Pattern 'ERROR' -Path *.log will search all log files in the current directory. Other cmdlets here have different roles: Get-Help shows usage information, Get-Command lists available commands, and ForEach-Object processes each input object rather than performing a search.