Capgemini Interview Question

What is object-oriented programming (OOP)? Explain the four pillars of OOP. What is a class and an object in Java? What is inheritance, and how does it work in Java? What is polymorphism, and how is it implemented in Java? What is encapsulation, and why is it important in OOP? What is abstraction, and how is it achieved in Java? What are constructors, and what is their role in Java classes? Explain the difference between method overloading and method overriding. What is the difference between an abstract class and an interface in Java? What is the purpose of the final keyword in Java? How does Java support multiple inheritance? What is a static method, and how does it differ from an instance method? What are access modifiers, and what are the different types in Java? Explain the concept of composition and aggregation in Java.