Pipeline input (ValueFromPipeline) in PowerShell - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to accept pipeline input for the parameter.

PowerShell

param([Parameter(ValueFromPipeline=[1])]$Name)
process { Write-Output $Name }

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

AFalse

B$false

CTrue

D$true

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'True' or 'False' without the $ sign causes errors.

Setting ValueFromPipeline to $false disables pipeline input.

The parameter attribute ValueFromPipeline must be set to $true to accept pipeline input.

2fill in blank

medium

Complete the code to process each pipeline input object.

PowerShell

process {
    Write-Output [1]
}

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

A$PSItem

B$Name

C$input

D$null

Attempts:

3 left

💡 Hint

Common Mistakes

Using $input returns all pipeline objects, not the current one.

Using $null outputs nothing.

Inside the process block, $PSItem represents the current pipeline object.

3fill in blank

hard

Fix the error in the parameter declaration to accept pipeline input by property name.

PowerShell

param([Parameter(ValueFromPipelineByPropertyName=[1])]$Age)

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

AFalse

BTrue

C$true

D$false

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'True' or 'False' without $ causes syntax errors.

Confusing ValueFromPipeline with ValueFromPipelineByPropertyName.

The ValueFromPipelineByPropertyName attribute must be set to $true to accept pipeline input by property name.

4fill in blank

hard

Fill both blanks to create a parameter that accepts pipeline input by value and process it.

PowerShell

param([Parameter(ValueFromPipeline=[1])]$Item)
process {
    Write-Output [2]
}

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

A$true

B$false

C$Item

D$null

Attempts:

3 left

💡 Hint

Common Mistakes

Setting ValueFromPipeline to $false disables pipeline input.

Outputting $null produces no output.

Set ValueFromPipeline to $true to accept pipeline input, and output the current item with $Item.

5fill in blank

hard

Fill all three blanks to accept pipeline input by property name and output the property value.

PowerShell

param([Parameter(ValueFromPipelineByPropertyName=[1])]
      $Name)
process {
    Write-Output [2].[3]
}

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

A$true

B$false

CName

D$PSItem

Attempts:

3 left

💡 Hint

Common Mistakes

Using $false disables pipeline input by property name.

Using $Name alone inside process does not access the pipeline object.

Set ValueFromPipelineByPropertyName to $true to accept input by property name. Inside process, $PSItem.Name accesses the property value.