[Solved] What will be the output of the following Kotlin code?val list: List = listOf("apple", null, "banana") val filtered = list.filterNotNull() println(filtered) | Kotlin

Kotlin - Null Safety

What will be the output of the following Kotlin code?

val list: List = listOf("apple", null, "banana")
val filtered = list.filterNotNull()
println(filtered)

A["apple", null, "banana"]

B[null]

C["apple", "banana"]

DCompilation error

Step-by-Step Solution

Solution:

Step 1: Understand filterNotNull() behavior
This function removes all null elements from a collection, returning a list of non-null elements.
Step 2: Apply filterNotNull() on the list
Original list has "apple", null, "banana". After filtering, only "apple" and "banana" remain.
Final Answer:
["apple", "banana"] -> Option C
Quick Check:
filterNotNull() removes nulls [OK]

Quick Trick: filterNotNull() removes all nulls from collections [OK]

Common Mistakes:

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