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What is the primary difference in Kotlin's type system related to null values?
Computer Science
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The correct option is:
- Nullable and non-nullable type declarations
Kotlin's type system distinguishes between references that can hold null (nullable types, denoted by ? after the type, e.g., String?) and references that cannot (non-nullable types, e.g., String). This feature forces developers to explicitly handle potential null values at compile time, significantly reducing the occurrence of null pointer exceptions.
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