You want to replace all vowels in a String input with '*' and get a new String. Which Kotlin code correctly does this while respecting String immutability?

hard📝 Application Q8 of 15

Kotlin - Data Types

You want to replace all vowels in a String input with '*' and get a new String. Which Kotlin code correctly does this while respecting String immutability?

Ainput.replace(Regex("[aeiouAEIOU]"), "*") println(input)

Bval result = input.replace(Regex("[aeiouAEIOU]"), "*")

Cinput[0] = '*' val result = input

Dinput.replaceAll("[aeiouAEIOU]", "*")

Step-by-Step Solution

Solution:

Step 1: Understand how to replace characters in String immutably
Use replace() with Regex to create a new String with vowels replaced.
Step 2: Check each option for correctness
val result = input.replace(Regex("[aeiouAEIOU]"), "*") correctly creates a new String with vowels replaced. input.replace(Regex("[aeiouAEIOU]"), "*") println(input) ignores the new String and prints original. input[0] = '*' val result = input tries to assign to String index (invalid). input.replaceAll("[aeiouAEIOU]", "*") uses non-existent replaceAll method.
Final Answer:
val result = input.replace(Regex("[aeiouAEIOU]"), "*") -> Option B
Quick Check:
Use replace with Regex to get new String [OK]

Quick Trick: Use replace with Regex to create new modified String [OK]

Common Mistakes:

MISTAKES

Trying to modify String in place
Ignoring returned new String from replace()
Using non-existent replaceAll method

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You want to replace all vowels in a String input with '*' and get a new String. Which Kotlin code correctly does this while respecting String immutability?

Step 1: Understand how to replace characters in String immutably

Step 2: Check each option for correctness

Final Answer:

Quick Check:

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