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Job Interview Questions and Answers Directory

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Java Easy technical

Q1. What is the difference between an interface and an abstract class?

- An interface declares a contract. It supports abstract methods plus default and static methods (Java 8+), private methods (Java 9+) and constants. A class can implement...

2 Answer

OOP Concepts Easy technical

Q2. What is the difference between an abstract class and an interface?

An interface declares a contract: a set of method signatures with no state that any type can implement. A class can implement many interfaces, which models capability. An...

0 Answer

C# Medium technical

Q3. When would you choose an interface over an abstract class?

Both define contracts that other types implement, but they differ in intent and mechanics. - An interface declares a contract with no state (traditionally) and supports m...

2 Answer