Automatic variables ($_, $PSVersionTable) in PowerShell - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to display the PowerShell version using the automatic variable.

PowerShell

Write-Output $[1].PSVersion

Drag options to blanks, or click blank then click option'

A$_

B$PSVersionTable

C$Version

D$PSVersion

Attempts:

3 left

💡 Hint

Common Mistakes

Using $_ instead of $PSVersionTable

Trying to use $Version which is not automatic

Using $PSVersion which is not defined

The automatic variable $PSVersionTable holds details about the PowerShell version. Accessing PSVersion property shows the version.

2fill in blank

medium

Complete the code to output each item in the pipeline using the automatic variable.

PowerShell

Get-Process | ForEach-Object { Write-Output [1] }

Drag options to blanks, or click blank then click option'

A$_

B$PSVersionTable

C$this

D$item

Attempts:

3 left

💡 Hint

Common Mistakes

Using $PSVersionTable inside pipeline which is unrelated

Using $this or $item which are not automatic variables in PowerShell

The automatic variable $_ represents the current object in the pipeline inside script blocks.

3fill in blank

hard

Fix the error in the code to correctly display the PowerShell version major number.

PowerShell

Write-Output $PSVersionTable.[1].Major

Drag options to blanks, or click blank then click option'

AVersion

BVersionTable

CPSVersion

DPSVersionTable

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'Version' instead of 'PSVersion' property

Trying to access 'VersionTable' or 'PSVersionTable' as properties

The property holding the version object inside $PSVersionTable is PSVersion. Accessing Major gives the major version number.

4fill in blank

hard

Fill both blanks to filter processes with CPU time greater than 100 and output their names.

PowerShell

Get-Process | Where-Object { $_.[1] -gt 100 } | ForEach-Object { Write-Output $_.[2] }

Drag options to blanks, or click blank then click option'

ACPU

BName

CId

DHandles

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'Id' or 'Handles' instead of 'CPU' for filtering

Outputting 'Id' instead of 'Name' for process names

The CPU property holds the CPU time used by a process. Filtering with -gt 100 selects processes using more than 100 CPU seconds. Then outputting the Name property shows their names.

5fill in blank

hard

Fill all three blanks to create a hashtable of process names and their IDs for processes with IDs less than 1000.

PowerShell

Get-Process | Where-Object { $_.[1] [2] 1000 } | ForEach-Object { $result[$_.[3]] = $_.Id }

Drag options to blanks, or click blank then click option'

AId

B<

CProcessName

DName

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'ProcessName' instead of 'Name' for the key

Using '>' instead of '<' for filtering

Using wrong property for filtering instead of 'Id'

The Id property is used to filter processes with IDs less than 1000 using <. The Name property is used as the key in the hashtable to store process IDs.