🧠 Object-Oriented Programming (OOP) Topics

1. 🧱 OOP Four Pillars

• Abstraction
  What is abstraction in OOP?

• Polymorphism
  What is polymorphism in OOP?

• Encapsulation
  What is encapsulation in OOP?

• Inheritance
  What is inheritance in OOP?

2. 🔄 Overloading vs Overriding

• What is the difference between method overloading and method overriding?

3. ⚙️ Method Overriding vs Constructor Overriding

• How is method overriding different from constructor overriding?
• Can constructors be overridden in OOP?

4. 🏗️ Constructor

• What is a constructor in OOP?
• What are the types of constructors?
• When is a constructor called?
• Can a constructor be private?

5. 🧩 Abstract Class vs Interface

• What is the difference between an abstract class and an interface?
• When should you use an abstract class vs an interface?

6. 🔐 Access Modifiers

• What are access modifiers in OOP?
• What is the difference between public, private, and protected access modifiers?

7. 🔍 Private vs Protected

• What is the difference between private and protected in OOP?

8. ⚡ Static

• What is the meaning of the static keyword in OOP?
• What are static methods, static variables, and static blocks?
• When should you use static members?

9. 🧬 Multiple Inheritance vs Multilevel Inheritance

• What is multiple inheritance?
• What is multilevel inheritance?
• What are the problems and solutions associated with multiple inheritance?

10. 🧱 Composition and Aggregation

• What is composition in OOP?
• What is aggregation in OOP?
• What is the difference between composition and aggregation?

11. 🆚 Composition vs Inheritance

• When should you prefer composition over inheritance?
• _What are the advantages and disadvantages of composition vs inheritance?