Default parameter values in PowerShell - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set a default value for the parameter $name.

PowerShell

function Greet-User {
    param(
        [string]$name = [1]
    )
    Write-Output "Hello, $name!"
}

Greet-User
Greet-User -name "Alice"

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

A"Visitor"

B"User"

C"Admin"

D"Guest"

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting to use quotes around the default string value.

Not using the equals sign to assign the default value.

The default value for the parameter $name is set to "Guest" so if no argument is passed, it uses "Guest".

2fill in blank

medium

Complete the code to set a default value of 10 for the parameter $count.

PowerShell

function Repeat-Message {
    param(
        [int]$count = [1]
    )
    for ($i = 1; $i -le $count; $i++) {
        Write-Output "Hello!"
    }
}

Repeat-Message
Repeat-Message -count 3

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

A10

B5

C3

D1

Attempts:

3 left

💡 Hint

Common Mistakes

Using quotes around numbers for integer parameters.

Not assigning any default value.

The default value for $count is set to 10, so the message prints 10 times if no argument is given.

3fill in blank

hard

Fix the error in the function by correctly setting the default value for $path to C:\Temp.

PowerShell

function Show-Path {
    param(
        [string]$path = [1]
    )
    Write-Output "Path is: $path"
}

Show-Path
Show-Path -path "C:\Windows"

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

AC:\Temp

B'C:\Temp'

C"C:\\Temp"

D"C:/Temp"

Attempts:

3 left

💡 Hint

Common Mistakes

Not using quotes around the string.

Using single quotes which do not interpret escape sequences.

Not escaping backslashes.

The default string value must be enclosed in double quotes with escaped backslashes for the path.

4fill in blank

hard

Fill both blanks to set default values for $user and $age parameters.

PowerShell

function User-Info {
    param(
        [string]$user = [1],
        [int]$age = [2]
    )
    Write-Output "User: $user, Age: $age"
}

User-Info
User-Info -user "Bob" -age 25

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

A"Anonymous"

B30

C25

D"Guest"

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up which default value goes to which parameter.

Using quotes around integer default values.

The default user is set to "Anonymous" and the default age is set to 30.

5fill in blank

hard

Fill all three blanks to create a function with default values for $file, $mode, and $verbose.

PowerShell

function Process-File {
    param(
        [string]$file = [1],
        [string]$mode = [2],
        [bool]$verbose = [3]
    )
    Write-Output "File: $file, Mode: $mode, Verbose: $verbose"
}

Process-File
Process-File -file "data.txt" -mode "read" -verbose $true

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

A"default.txt"

B"read"

C$false

D"write"

Attempts:

3 left

💡 Hint

Common Mistakes

Using quotes around boolean values.

Mixing up mode default values.

The default file is "default.txt", mode is "read", and verbose is false by default.