[Solved] Find the problem in this Kotlin code:val a: String? = null val b: String? = null val c = a ?: b println(c.length) | Kotlin

Kotlin - Operators and Expressions

Find the problem in this Kotlin code:

val a: String? = null
val b: String? = null
val c = a ?: b
println(c.length)

ACompilation error due to println

BPossible null pointer exception on c.length

CVariable c cannot be nullable

DIncorrect Elvis operator usage

Step-by-Step Solution

Solution:

Step 1: Evaluate Elvis operator result
Both a and b are null, so c becomes null.
Step 2: Accessing property on null
Calling c.length causes a null pointer exception at runtime.
Final Answer:
Possible null pointer exception on c.length -> Option B
Quick Check:
Accessing property on nullable without check risks exception [OK]

Quick Trick: Check for null before accessing properties after Elvis [OK]

Common Mistakes:

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