[Solved] This Kotlin code calls a Java method returning a platform type:val length = javaObject.getName()?.length ?: 0What is the main benefit of using ?. here? | Kotlin

Kotlin - Null Safety

This Kotlin code calls a Java method returning a platform type:

val length = javaObject.getName()?.length ?: 0

What is the main benefit of using ?. here?

AIt forces the compiler to treat the value as non-null

BIt throws an exception if the value is null

CIt converts the platform type to a non-nullable type

DIt safely handles null by returning 0 instead of crashing

Step-by-Step Solution

Solution:

Step 1: Identify safe call operator usage
The ?. operator calls length only if getName() is not null.
Step 2: Understand Elvis operator fallback
If getName() is null, the expression returns 0 instead of crashing.
Final Answer:
It safely handles null by returning 0 instead of crashing -> Option D
Quick Check:
Safe call + Elvis operator prevent null crashes [OK]

Quick Trick: Use ?. and ?: to avoid null crashes with platform types [OK]

Common Mistakes:

MISTAKES

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