String concatenation in PowerShell - Practice Problems & Coding Challenges

Challenge - 5 Problems

💻 Command Output

intermediate

What is the output of this PowerShell string concatenation?

Consider the following PowerShell code snippet. What will it output?

PowerShell

$a = "Hello"
$b = "World"
$c = $a + " " + $b
Write-Output $c

A Hello+ World

B HelloWorld

C Hello World

D Hello + World

💡 Hint

Look at how the + operator works with strings in PowerShell.

In PowerShell, the + operator concatenates strings exactly as written. The code adds a space between $a and $b, so the output is 'Hello World'.

💻 Command Output

intermediate

What does this PowerShell code output?

What is the output of this code snippet?

PowerShell

$str1 = "Power"
$str2 = "Shell"
$result = "$str1$str2"
Write-Output $result

A Power+Shell

B PowerShell

C $str1$str2

D Power Shell

💡 Hint

Check how variables inside double quotes behave in PowerShell.

Variables inside double quotes are expanded in PowerShell, so "$str1$str2" becomes 'PowerShell' without spaces.

📝 Syntax

advanced

Which option correctly concatenates strings with a space in PowerShell?

Select the option that correctly concatenates the strings "Good" and "Morning" with a space between them.

A $greeting = "Good" + " " + "Morning"

B $greeting = "Good" . " " . "Morning"

C $greeting = "Good" & " " & "Morning"

D $greeting = "Good" -join " " -join "Morning"

💡 Hint

Remember the operator PowerShell uses for string concatenation.

In PowerShell, the + operator concatenates strings. The dot (.) and ampersand (&) are not used for string concatenation, and -join is used differently.

🔧 Debug

advanced

Why does this PowerShell string concatenation fail?

This code throws an error. What is the cause? $part1 = 'Hello' $part2 = 'World' $combined = $part1 + $part2 Write-Output $combined

PowerShell

$part1 = 'Hello'
$part2 = 'World'
$combined = $part1 + $part2
Write-Output $combined

A No error; the code outputs 'HelloWorld'.

B Error because + operator cannot concatenate strings in PowerShell.

C Error because single quotes do not allow string concatenation.

D Error because variables must be declared with $ before each use.

💡 Hint

Try running the code to see if it produces an error.

PowerShell allows string concatenation with + operator regardless of single or double quotes. The code runs fine and outputs 'HelloWorld'.

🚀 Application

expert

How many characters are in the concatenated string?

Given this PowerShell code, how many characters does the variable $fullName contain? $firstName = "Anna" $lastName = "Smith" $fullName = $firstName + " " + $lastName Count the characters including spaces.

PowerShell

$firstName = "Anna"
$lastName = "Smith"
$fullName = $firstName + " " + $lastName

A 8

B 11

C 9

D 10

💡 Hint

Count letters in 'Anna', a space, and 'Smith'.

The string 'Anna Smith' has 4 (Anna) + 1 (space) + 5 (Smith) = 10 characters.