[Solved] Find the error in this Kotlin code:val map = mapOf("a" to 1) val value = map.getValue("b") ?: 0 println(value) | Kotlin

Kotlin - Collections Fundamentals

Find the error in this Kotlin code:

val map = mapOf("a" to 1)
val value = map.getValue("b") ?: 0
println(value)

AThrows exception because getValue throws if key missing

Bvalue will be 0

Cvalue will be null

DCompilation error due to ?: usage

Step-by-Step Solution

Solution:

Step 1: Understand getValue behavior
getValue(key) throws NoSuchElementException if the key is not present in the map.
Step 2: Analyze ?: operator effect
The Elvis operator ?: is not reached because exception is thrown before it can be applied.
Final Answer:
Throws exception because getValue throws if key missing -> Option A
Quick Check:
getValue throws on missing key, ?: won't catch it [OK]

Quick Trick: Use map[key] ?: default instead of getValue for safe access [OK]

Common Mistakes:

MISTAKES

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