PowerShell - Cmdlets and Pipeline
You want to create a list of running processes showing only their 'Name' and 'Id', but also add a new property 'ShortName' that shows the first 3 letters of the process name. Which command achieves this?
Which command achieves this?
hard📝 Application Q15 of 15
Step-by-Step Solution
Solution:
Step 1: Understand how to add calculated properties
Use a hashtable with Name and Expression keys inside Select-Object to add new properties.Step 2: Check each option
Get-Process | Select-Object Name, Id, @{Name='ShortName';Expression={$_.Name.Substring(0,3)}} correctly uses @{Name='ShortName';Expression={$_.Name.Substring(0,3)}} to add the new property. Get-Process | Select-Object Name, Id, ShortName = $_.Name.Substring(0,3) has wrong syntax. Get-Process | Select-Object -Property Name, Id, ShortName tries to select a non-existent property. Get-Process | Select-Object Name, Id | Add-Member -Name ShortName -Value {$_.Name.Substring(0,3)} uses Add-Member incorrectly for pipeline objects.Final Answer:
Get-Process | Select-Object Name, Id, @{Name='ShortName';Expression={$_.Name.Substring(0,3)}} -> Option CQuick Check:
Use hashtable with Expression to add calculated property [OK]
Quick Trick: Add calculated properties with @{Name='';Expression={}} in Select-Object [OK]
Common Mistakes:
- Trying to assign calculated properties directly without hashtable
- Selecting non-existent properties without calculation
- Using Add-Member incorrectly in pipeline
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