Mastering PowerShell cmdlets is a cornerstone of system administration and a frequent topic in HackerRank's PowerShell certification tests. When tackling challenges like "Powershell 3 Cmdlets," the focus is usually on the "Big Three" commands—Get-Help, Get-Command, and Get-Member—which are essential for discovering and exploring PowerShell's vast environment. The "Big Three" Core Cmdlets
Select-Object ProcessName, Id, @Name="WorkingSet_MB"; Expression= ... ProcessName and Id as-is.WorkingSet_MB:
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([int](Read-Host) * 3)
Filter by status: You can combine this with a filter to find services that are currently running: powershell Get-Service | Where-Object $_.Status -eq "Running" Use code with caution. Copied to clipboard Pro-Tips for HackerRank PowerShell Challenges Mastering PowerShell cmdlets is a cornerstone of system
: Lists all available cmdlets, functions, and aliases on the system. Get-Service Selects ProcessName and Id as-is
also returns aliases and functions, you must pipe the results into Where-Object . Filter the CommandType property to strictly match the value 3. Measure the results Pipe the filtered list into Measure-Object (or its alias
To read input from the console in PowerShell, the standard cmdlet is Read-Host.
cmdlet to pull every available command from the system's current session. 2. Filter for cmdlets only Get-Command