[Solved] Given this Kotlin code, what will result be?fun getName(): String? = null fun getDefaultName(): String = "Guest" val result = getName() ?: getDefaultName() ?: "Unknown" | Kotlin

Kotlin - Operators and Expressions

Given this Kotlin code, what will result be?

fun getName(): String? = null
fun getDefaultName(): String = "Guest"
val result = getName() ?: getDefaultName() ?: "Unknown"

A"Guest"

B"Unknown"

Cnull

DCompilation error

Step-by-Step Solution

Solution:

Step 1: Evaluate getName() call
getName() returns null.
Step 2: Evaluate getDefaultName() call
getDefaultName() returns "Guest", which is not null.
Step 3: Elvis operator chain result
Since getDefaultName() is not null, result is "Guest".
Final Answer:
"Guest" -> Option A
Quick Check:
Elvis operator returns first non-null in chain [OK]

Quick Trick: Elvis operator calls functions left to right until non-null [OK]

Common Mistakes:

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