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Chapters

01Chapter 1: How Kotlin Gets Interviewed 02Chapter 2: Kotlin on the JVM 03Chapter 3: Types, Nullability, and Smart Casts 04Chapter 4: Functions 05Chapter 5: Lambdas, Higher-Order Functions, and `inline`06Chapter 6: Classes, Constructors, and Initialization Order 07Chapter 7: Data Classes 08Chapter 8: Sealed Classes, Sealed Interfaces, and Exhaustive `when`09Chapter 9: Objects, Companions, and Singletons 10Chapter 10: Delegation 11Chapter 11: Generics and Variance 12Chapter 12: Collections and Sequences 13Chapter 13: Scope Functions 14Chapter 14: Error Handling 15Chapter 15: Coroutine Fundamentals 16Chapter 16: Cancellation and Exception Handling 17Chapter 17: Flow, StateFlow, and SharedFlow 18Chapter 18: Java Interop 19Chapter 19: Performance and Memory 20Chapter 20: The Code Review Round

Chapter 3: Types, Nullability, and Smart Casts

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