Java and Kotlin

1. What is the difference between an abstract class and an interface in Java?

Answer

2. What is the difference between the “==” operator and the “.equals()” method in Java?

Answer

3. What is a lambda expression in Kotlin?

Answer

4. What is the difference between a lateinit property and an initialized property in Kotlin?

Answer

5. What is the difference between a HashSet and a TreeSet in Java?

Answer

6. What is a companion object in Kotlin?

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7. What is the difference between a class and an object in Kotlin?

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8. What is polymorphism in Java?

Answer

9. What is a functional interface in Java?

Answer

10. What is the difference between a private and a protected method in Java?

Answer

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