What is Object-Oriented Programming (OOP)? Explain the four pillars of OOP.
Answer:
- Object-Oriented Programming (OOP): OOP is a programming paradigm based on the concept of objects, which can contain data (attributes) and methods (functions). It emphasizes modularity, encapsulation, inheritance, and polymorphism.
- Four Pillars of OOP:
- Encapsulation: Encapsulation refers to bundling data and methods that operate on the data within a single unit (class). It helps hide the internal implementation details of an object and provides access through well-defined interfaces.
- Inheritance: Inheritance allows a class (subclass) to inherit attributes and methods from another class (superclass). It promotes code reuse and facilitates the creation of hierarchies of related classes.
- Polymorphism: Polymorphism allows objects of different classes to be treated as objects of a common superclass. It enables methods to be invoked on objects without knowing their specific types, leading to more flexible and reusable code.
- Abstraction: Abstraction involves modeling real-world entities as simplified representations in code. It focuses on essential properties while hiding unnecessary details. Abstraction helps manage complexity and facilitates problem-solving at higher levels of abstraction.
Software Developer Interview Questions
Software developer interview questions can cover a wide range of topics, depending on the specific role, company, and level of experience being targeted. The software developer interview questions aim to assess a candidate’s technical skills, problem-solving abilities, communication skills, and fit for the role and the company.
Table of Content
- Interview Questions for Internship and Fresher Level
- Interview Questions for Software Development Engineer SDE 1 level
- Interview Questions for Software Development Engineer SDE 2 level
- Interview Questions for Software Development Engineer SDE 3 level