CompTIA Server+ SK0-005 Practice Question

The correct choice explains that $serviceState is a variable used to store the value of the Status property (such as "Running" or "Stopped") from the ServiceController object returned by Get-Service for the wuauserv service. The parentheses ensure that the Get-Service command runs first, then its Status property is accessed and the resulting value is assigned to the variable.

The other answers are incorrect for these reasons:

• Selecting an entire object or multiple properties without expansion would return a ServiceController object-or a collection if multiple objects were targeted-not a single property value.
• A command alias is a symbolic shortcut (for example, gsv for Get-Service) and never begins with $.
• Environment variables require the env: drive prefix (for example, $Env:PATH). Variables that begin with $ alone are ordinary PowerShell variables that reside in the current scope unless an explicit scope modifier ($script:, $global:) is used.