This script is intended to run on Windows and Linux but uses a Windows-only environment variable. What is the problem?

medium📝 Debug Q14 of 15

PowerShell - Cross-Platform PowerShell

if ($env:OS -eq 'Windows_NT') { Write-Host 'Windows' } else { Write-Host 'Linux or macOS' }

AThe else block syntax is incorrect

BMissing parentheses around condition

CWrite-Host is not supported on Linux

DUsing $env:OS is Windows-only and undefined on Linux

Step-by-Step Solution

Solution:

Step 1: Check environment variable usage
$env:OS is defined only on Windows, so on Linux it is empty or undefined.
Step 2: Understand the problem with $env:OS
Because $env:OS is missing on Linux, the script relies on a Windows-specific variable, making it non-portable.
Final Answer:
Using $env:OS is Windows-only and undefined on Linux -> Option D
Quick Check:
$env:OS is Windows-only env var [OK]

Quick Trick: Avoid Windows-only env vars for cross-platform scripts [OK]

Common Mistakes:

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