Bird
0
0

What is the primary reason Kotlin prefers val declarations over var by default?

easy📝 Conceptual Q1 of 15
Kotlin - Variables and Type System
What is the primary reason Kotlin prefers val declarations over var by default?
ATo improve runtime performance by using mutable variables
BTo promote safer code by preventing unintended variable reassignment
CTo allow variables to be changed anywhere in the program
DTo reduce the amount of code needed for variable declarations
Step-by-Step Solution
Solution:

  1. Step 1: Understand Kotlin's default behavior

    Kotlin uses val for variables by default to make them immutable.

  2. Step 2: Reason about immutability benefits

    Immutability helps avoid bugs caused by accidental changes to variables.

  3. Final Answer:

    To promote safer code by preventing unintended variable reassignment -> Option B

  4. Quick Check:

    Immutability prevents accidental changes [OK]
Quick Trick: Immutability avoids accidental changes [OK]
Common Mistakes:
MISTAKES
  • Confusing immutability with performance optimization
  • Thinking var is safer than val
  • Assuming val variables can be reassigned

Want More Practice?

15+ quiz questions · All difficulty levels · Free

Free Signup - Practice All Questions
More Kotlin Quizzes
Control Flow as Expressions - When as expression returning value - Quiz 7medium Data Types - Type conversion is always explicit - Quiz 9hard Kotlin Basics and JVM Runtime - Comments and documentation syntax - Quiz 3easy Kotlin Basics and JVM Runtime - Why Kotlin over Java - Quiz 10hard Kotlin Basics and JVM Runtime - What is Kotlin - Quiz 13medium Loops and Ranges - Why ranges simplify iteration - Quiz 15hard Null Safety - Platform types from Java interop - Quiz 11easy Null Safety - Null safety in collections - Quiz 5medium Operators and Expressions - Operator precedence - Quiz 1easy Variables and Type System - Type checking with is operator - Quiz 14medium