String methods (.Split, .Replace, .Trim) in PowerShell - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to split the string into an array of words.

PowerShell

$text = "hello world"
$words = $text.[1](' ')
$words

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

ASplit

BReplace

CTrim

DJoin

Attempts:

3 left

💡 Hint

Common Mistakes

Using Replace instead of Split will change text but not split it.

Trim removes spaces only at the start or end, not between words.

The Split method breaks a string into parts based on the separator. Here, space (' ') splits the text into words.

2fill in blank

medium

Complete the code to replace all commas with semicolons in the string.

PowerShell

$csv = "apple,banana,orange"
$newCsv = $csv.[1](',', ';')
$newCsv

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

ASplit

BReplace

CTrim

DJoin

Attempts:

3 left

💡 Hint

Common Mistakes

Using Split will create an array, not replace characters.

Trim only removes spaces at the ends, not commas.

Replace swaps all occurrences of the first string with the second string.

3fill in blank

hard

Fix the error in the code to trim spaces from the string.

PowerShell

$input = "  hello  "
$output = $input.[1]()
$output

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

ATrim

BReplace

CSplit

DTrimStart

Attempts:

3 left

💡 Hint

Common Mistakes

Using Replace without arguments causes an error.

TrimStart removes spaces only at the start, not the end.

Trim removes spaces from both the start and end of the string.

4fill in blank

hard

Fill both blanks to split the string by comma and trim spaces from each word.

PowerShell

$data = " apple, banana , orange "
$items = $data.[1](',') | ForEach-Object { $_.[2]() }
$items

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

ASplit

BReplace

CTrim

DTrimEnd

Attempts:

3 left

💡 Hint

Common Mistakes

Using Replace instead of Split will not create an array.

Using TrimEnd only removes spaces at the end, not start.

First, Split breaks the string by commas. Then, Trim removes spaces from each item.

5fill in blank

hard

Fill all three blanks to replace spaces with dashes, trim the string, and split by dash.

PowerShell

$text = "  hello world example  "
$result = $text.[1](' ', '-')
$result = $result.[2]('-')
$array = $result.[3]('-')
$array

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

AReplace

BTrim

CSplit

DTrimStart

Attempts:

3 left

💡 Hint

Common Mistakes

Using TrimStart instead of Trim leaves spaces at the end.

Splitting before replacing spaces causes wrong results.

Replace changes spaces to dashes, Trim removes dashes at ends, Split breaks string by dashes.

Practice

1. What does the .Trim() method do to a string in PowerShell?

easy

A. Converts the string to uppercase

B. Splits the string into an array based on a separator

C. Replaces a part of the string with another string

D. Removes spaces from the start and end of the string

Solution

1. Step 1: Understand the purpose of .Trim()

   The .Trim() method removes whitespace characters from the beginning and end of a string.

2. Step 2: Compare with other methods

   .Split() breaks a string into parts, .Replace() swaps text, and uppercase conversion is unrelated.

3. Final Answer:

   Removes spaces from the start and end of the string -> Option D

4. Quick Check:

   .Trim() = Remove spaces [OK]

Hint: Trim cleans spaces only at string edges [OK]

Common Mistakes:

• Confusing .Trim() with .Split()
• Thinking .Trim() changes inside spaces
• Mixing .Trim() with .Replace()

2. Which of the following is the correct syntax to split a string $text by commas in PowerShell?

easy

A. Split($text, ',')

B. $text.Replace(',')

C. $text.Split(',')

D. $text.Trim(',')

Solution

1. Step 1: Identify the correct method for splitting

   The .Split() method is used on a string object with the separator as an argument.

2. Step 2: Check syntax correctness

   $text.Split(',') correctly calls Split on $text with comma separator. Other options misuse methods or syntax.

3. Final Answer:

   $text.Split(',') -> Option C

4. Quick Check:

   Split method syntax = $string.Split(separator) [OK]

Hint: Use .Split() with separator in parentheses [OK]

Common Mistakes:

• Using .Replace() instead of .Split()
• Trying to pass separator to .Trim()
• Calling Split as a standalone function

3. What is the output of this PowerShell code?

$text = " apple, banana , cherry "
$parts = $text.Split(',')
$trimmed = $parts | ForEach-Object { $_.Trim() }
$trimmed

medium

A. [" apple", " banana ", " cherry "]

B. ["apple", "banana", "cherry"]

C. ["apple, banana, cherry"]

D. [" apple banana cherry "]

Solution

1. Step 1: Split the string by commas

   $text.Split(',') creates an array: [" apple", " banana ", " cherry "] with spaces around words.

2. Step 2: Trim spaces from each element

   The ForEach-Object applies .Trim() to each element, removing spaces, resulting in ["apple", "banana", "cherry"].

3. Final Answer:

   ["apple", "banana", "cherry"] -> Option B

4. Quick Check:

   Split + Trim = clean array elements [OK]

Hint: Trim each split part to remove spaces [OK]

Common Mistakes:

• Not trimming after splitting
• Expecting a single string output
• Confusing array output format

4. Identify the error in this PowerShell code snippet:

$text = "Hello World"
$newText = $text.Replace(' ', '')
$parts = $newText.Split(' ')

medium

A. Split will return the whole string as one element because spaces were removed

B. Replace syntax is incorrect, it needs three arguments

C. Split cannot be used on strings

D. The variable $newText is not assigned properly

Solution

1. Step 1: Understand Replace effect

   $text.Replace(' ', '') removes all spaces, so $newText becomes "HelloWorld" with no spaces.

2. Step 2: Analyze Split on $newText

   Splitting by space on "HelloWorld" returns one element array because no spaces remain.

3. Final Answer:

   Split will return the whole string as one element because spaces were removed -> Option A

4. Quick Check:

   Replace removes spaces, so Split finds none [OK]

Hint: Replace removes spaces before Split runs [OK]

Common Mistakes:

• Thinking Replace needs 3 arguments
• Expecting Split to split without separator present
• Assuming $newText is unchanged

5. You have a string $data = " red; green ; light blue ; yellow ". How do you split it into an array of clean (trimmed) color names using PowerShell?

hard

A. $data.Split(';') | ForEach-Object { $_.Trim() }

B. $data.Replace(' ', '').Split(';')

C. $data.Split(';').Trim()

D. $data.Trim().Split(';')

Solution

1. Step 1: Split string by semicolon

   Use $data.Split(';') to get array: [" red", " green ", " light blue ", " yellow "] with spaces.

2. Step 2: Trim spaces from each element

   Pipe to ForEach-Object with .Trim() to remove spaces from each color name.

3. Step 3: Check other options

   The option $data.Split(';').Trim() tries to call .Trim() on the array (invalid). The option $data.Replace(' ', '').Split(';') removes all spaces, merging multi-word colors like "light blue" into "lightblue" (wrong). The option $data.Trim().Split(';') trims only ends of the whole string.

4. Final Answer:

   $data.Split(';') | ForEach-Object { $_.Trim() } -> Option A

5. Quick Check:

   Split then trim each element = clean array [OK]

Hint: Split first, then trim each part separately [OK]

Common Mistakes:

• Calling .Trim() on array directly
• Removing all spaces inside words
• Trimming only the whole string, not parts