Parameter validation in PowerShell - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to validate that the parameter $Age is an integer.

PowerShell

param([[1]]$Age)
Write-Output "Age is $Age"

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

Aint

Bstring

Cbool

Darray

Attempts:

3 left

💡 Hint

Common Mistakes

Using [string] instead of [int] allows any text, not just numbers.

Using [bool] or [array] does not match the expected integer type.

The [int] type validates that the parameter is an integer.

2fill in blank

medium

Complete the code to validate that the parameter $Name is mandatory.

PowerShell

param(
    [Parameter([1]=$true)]
    [string]$Name
)
Write-Output "Name is $Name"

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

APosition

BOptional

CMandatory

DValueFromPipeline

Attempts:

3 left

💡 Hint

Common Mistakes

Using Optional instead of Mandatory allows skipping the parameter.

Using Position or ValueFromPipeline does not enforce requirement.

The 'Mandatory' attribute makes the parameter required.

3fill in blank

hard

Fix the error in the code to validate that $Score is between 0 and 100.

PowerShell

param(
    [ValidateRange([1], 100)]
    [int]$Score
)
Write-Output "Score is $Score"

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

A1

B100

C-1

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using 1 as minimum excludes 0 which may be valid.

Using -1 allows negative scores which are invalid.

Using 100 as minimum is incorrect because max must be >= min.

The ValidateRange attribute requires the minimum value first, which is 0.

4fill in blank

hard

Fill in the blank to validate that $Color is one of the allowed values.

PowerShell

param(
    [ValidateSet([1])]
    [string]$Color
)
Write-Output "Color is $Color"

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

A'Red', 'Green', 'Blue'

B'Yellow', 'Purple', 'Orange'

C'Circle', 'Square', 'Triangle'

D'Cat', 'Dog', 'Bird'

Attempts:

3 left

💡 Hint

Common Mistakes

Using unrelated sets like shapes or animals.

Not using quotes around the values.

ValidateSet restricts the parameter to the specified values: Red, Green, Blue.

5fill in blank

hard

Fill all three blanks to validate $Count is an integer between 1 and 10 and mandatory.

PowerShell

param(
    [Parameter([1]=$true)]
    [ValidateRange([2], [3])]
    [int]$Count
)
Write-Output "Count is $Count"

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

AMandatory

B1

C10

DOptional

Attempts:

3 left

💡 Hint

Common Mistakes

Setting Mandatory to false or Optional allows skipping the parameter.

Using wrong range values like 0 or 11.

The parameter is mandatory and must be between 1 and 10 inclusive.