[Solved] Given this Kotlin code, what is the output?val set1 = setOf(1, 2, 3) val set2 = mutableSetOf(3, 4, 5) val combined = set1 + set2 println(combined) | Kotlin

Kotlin - Collections Fundamentals

Given this Kotlin code, what is the output?

val set1 = setOf(1, 2, 3)
val set2 = mutableSetOf(3, 4, 5)
val combined = set1 + set2
println(combined)

A[1, 2, 3, 4, 5]

B[3, 4, 5]

C[1, 2, 3]

DCompilation error

Step-by-Step Solution

Solution:

Step 1: Understand '+' operator on sets
In Kotlin, '+' combines two collections into a new set containing all unique elements.
Step 2: Combine elements and remove duplicates
Elements 1, 2, 3, 4, 5 are combined; duplicates like 3 appear only once.
Final Answer:
[1, 2, 3, 4, 5] -> Option A
Quick Check:
Set union with '+' combines unique elements [OK]

Quick Trick: Use '+' to combine sets without duplicates [OK]

Common Mistakes:

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