[Solved] What is wrong with this Kotlin code snippet?val arr = arrayOfNulls(3) arr[0] = 1 arr[1] = null arr[2] = 3 println(arr.sum()) | Kotlin

Kotlin - Collections Fundamentals

What is wrong with this Kotlin code snippet?

val arr = arrayOfNulls(3)
arr[0] = 1
arr[1] = null
arr[2] = 3
println(arr.sum())

AarrayOfNulls cannot hold null values

BCannot assign Int to arrayOfNulls

CNo error, code runs fine

Dsum() cannot be called on Array<Int?>

Step-by-Step Solution

Solution:

Step 1: Understand arrayOfNulls type
arrayOfNulls(3) creates Array allowing nulls.
Step 2: Check sum() usage on nullable array
sum() is not defined for Array, only for IntArray or List.
Final Answer:
sum() cannot be called on Array -> Option D
Quick Check:
sum() needs non-nullable numeric collections [OK]

Quick Trick: sum() works on IntArray, not Array [OK]

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