You need a Kotlin function that returns an immutable list of the first five even numbers. Which function implementation ensures the returned list cannot be modified?

hard📝 Application Q8 of 15

Kotlin - Variables and Type System

Afun getEvens(): List<Int> = mutableListOf(2, 4, 6, 8, 10)

Bfun getEvens(): MutableList<Int> = mutableListOf(2, 4, 6, 8, 10)

Cfun getEvens(): ArrayList<Int> = arrayListOf(2, 4, 6, 8, 10)

Dfun getEvens(): List<Int> = listOf(2, 4, 6, 8, 10)

Step-by-Step Solution

Solution:

Step 1: Understand list types
List is immutable, MutableList is mutable.
Step 2: Analyze options
fun getEvens(): List = listOf(2, 4, 6, 8, 10) returns an immutable List using listOf.
Step 3: Identify mutable returns
Options B, C, and D return mutable lists or mutable types.
Final Answer:
fun getEvens(): List<Int> = listOf(2, 4, 6, 8, 10) -> Option D
Quick Check:
Use listOf for immutable lists [OK]

Quick Trick: Use listOf() for immutable lists [OK]

Common Mistakes:

MISTAKES

Returning mutableListOf() when immutability is required
Confusing List and MutableList types
Assuming ArrayList is immutable

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More Kotlin Quizzes

You need a Kotlin function that returns an immutable list of the first five even numbers. Which function implementation ensures the returned list cannot be modified?

Step 1: Understand list types

Step 2: Analyze options

Step 3: Identify mutable returns

Final Answer:

Quick Check:

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