Q1. What are Kotlin coroutines and when should you use them?
Coroutines are Kotlin's solution for asynchronous and concurrent code. They are lightweight, suspendable computations: a `suspend` function can pause without blocking a t...
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Q2. What are extension functions and what are their limitations?
An extension function adds a method to a class without modifying or inheriting it. Resolution is static. ```kotlin fun String.toTitleCase(): String = split(" ").joinToStr...
Q3. What is polymorphism and what forms does it take?
Polymorphism lets one interface be used by many implementations, so callers depend on a contract rather than a concrete type. Subtype or runtime polymorphism: a base refe...
Q4. How do traits compare with interfaces in other languages?
A trait defines shared behaviour: a set of method signatures a type can implement. Implementations can be written for types you did not define, as long as you own the tra...