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Object-Oriented Programming Blogs
OOP concepts, design patterns, and SOLID principles across languages
Python Design Patterns: Factory, Singleton, Observer, and SOLID Principles
Master essential Python design patterns and SOLID principles for scalable ML applications. Learn Factory, Singleton, Observer, Strategy, Builder, Adapter, Facade, Command patterns with practical examples
Dependency Injection Explained for Beginners in TypeScript
Master dependency injection in TypeScript with practical examples. Learn DI patterns, constructor injection, interface-based DI, IoC containers, and build testable, maintainable applications
Composition vs Inheritance: OOP Best Practices in JavaScript
Master composition over inheritance in JavaScript with practical examples. Learn when to use each pattern, avoid inheritance pitfalls, and build flexible, maintainable code with real-world scenarios
Abstract Classes vs Interfaces: When to Use Which in TypeScript
Master the difference between abstract classes and interfaces in TypeScript. Learn when to use each with practical examples, design patterns, and best practices for clean, maintainable code
How to Explain OOP in a Job Interview with JavaScript Examples
Master explaining OOP concepts in interviews with practical JavaScript examples. Learn how to articulate encapsulation, inheritance, polymorphism, and abstraction clearly for technical interviews
Python OOP Magic Methods: __init__, __str__, __repr__ Complete Guide
Master Python magic methods (dunder methods) with practical examples. Learn __init__, __str__, __repr__, __len__, __eq__, __add__ and more to write Pythonic, object-oriented code
Polymorphism for Beginners: Method Overloading vs Overriding in TypeScript
Master polymorphism in TypeScript with clear examples of method overloading and overriding. Learn compile-time vs runtime polymorphism, function signatures, and practical design patterns
![Top 20 OOP Interview Questions and Answers [2025]](https://ik.imagekit.io/ojaswiat/ojaswiat-com/images/blog/oop-interview-questions-2025.jpg)
Top 20 OOP Interview Questions and Answers [2025]
Master OOP interview questions with detailed answers and Python examples. Cover encapsulation, inheritance, polymorphism, abstraction, SOLID principles, and design patterns for coding interviews
OOP Concepts Explained with Real World Examples in Python
Master object-oriented programming concepts with practical real-world examples in Python. Learn classes, objects, encapsulation, inheritance, polymorphism, and abstraction with hands-on code you can use today
Encapsulation in OOP: Complete Guide with JavaScript Code Examples
Master encapsulation in JavaScript with practical examples. Learn private properties, getters/setters, closures, WeakMaps, and modern JavaScript encapsulation patterns for clean, maintainable code
OOP Design Patterns Every Developer Should Know in Python
Master essential OOP design patterns in Python with practical examples. Learn Singleton, Factory, Observer, Strategy, Decorator patterns and more to write professional, maintainable code
JavaScript OOP: Prototypes vs Classes Explained with Examples
Master JavaScript prototypal inheritance vs ES6 classes. Learn prototypes, prototype chain, constructor functions, and when to use classes or prototypes for clean, modern JavaScript code
SOLID Principles Explained with Practical Python Examples
Master SOLID design principles in Python with real-world examples. Learn Single Responsibility, Open/Closed, Liskov Substitution, Interface Segregation, and Dependency Inversion with hands-on code
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