30 Asked PHP OOPs Interview Questions and Answers (2024)

OOP is a programming paradigm that uses objects, which are instances of classes, to organize and structure code.

The four pillars of OOP are encapsulation, inheritance, polymorphism, and abstraction.

Encapsulation is the bundling of data and methods that operate on the data into a single unit, i.e., a class.

Inheritance allows a class to inherit properties and methods from another class. It promotes code reusability.

Polymorphism allows objects of different classes to be treated as objects of a common base class. It includes method overloading and overriding.