Bird
0
0

Why does setOf(1, 2, 2, 3) contain only three elements in Kotlin?

hard📝 Conceptual Q10 of 15
Kotlin - Collections Fundamentals
Why does setOf(1, 2, 2, 3) contain only three elements in Kotlin?
AThe second '2' causes a runtime error and is ignored
BSets automatically remove duplicate elements
CKotlin limits set size to 3 by default
DsetOf() converts duplicates to null
Step-by-Step Solution
Solution:

  1. Step 1: Recall set properties

    Sets in Kotlin store only unique elements; duplicates are removed automatically.

  2. Step 2: Explain why duplicates are removed

    The duplicate '2' is ignored because sets cannot have repeated values.

  3. Final Answer:

    Sets automatically remove duplicate elements -> Option B

  4. Quick Check:

    Set uniqueness removes duplicates [OK]
Quick Trick: Sets keep only unique values, no duplicates allowed [OK]
Common Mistakes:
MISTAKES
  • Thinking duplicates cause errors
  • Believing set size is limited
  • Assuming duplicates become null

Want More Practice?

15+ quiz questions · All difficulty levels · Free

Free Signup - Practice All Questions
More Kotlin Quizzes
Control Flow as Expressions - When without argument - Quiz 1easy Data Types - Boolean type and logical operators - Quiz 14medium Data Types - Int, Long, Float, Double number types - Quiz 2easy Data Types - Type conversion is always explicit - Quiz 10hard Functions - Function declaration syntax - Quiz 13medium Kotlin Basics and JVM Runtime - Why Kotlin over Java - Quiz 1easy Null Safety - Safe call operator (?.) - Quiz 7medium Operators and Expressions - Why operators are functions in Kotlin - Quiz 13medium Variables and Type System - Var for mutable references - Quiz 4medium Variables and Type System - Constant values with const val - Quiz 3easy