Liskov Substitution Principle (LSP) Explained with Real Examples | SOLID Principles in OOP

Unlock one of the MOST powerful and misunderstood SOLID principles — The Liskov Substitution Principle (LSP). In this video, we’ll go step-by-step through what LSP is, why it matters, and how violating it can silently break your applications. This tutorial is designed for developers at all levels — students, working professionals, and interview aspirants. ⸻ ⭐ What’s Covered in This Video ✔ What is the Liskov Substitution Principle? ✔ Why inheritance often violates LSP ✔ Incorrect vs Correct examples (Rectangle–Square, Payment Processor, Logger etc.) ✔ How to identify LSP violations in real code ✔ How to redesign classes to follow LSP ✔ Practical industry use cases ✔ LSP in Java, OOP, and system design interviews ⸻ 🧠 Why LSP Matters • Makes your code predictable • Reduces bugs due to incorrect inheritance • Improves maintainability in large systems • Helps you follow Clean Architecture & SOLID • Crucial for mid-senior interviews (SDE2, SDE3, Leads) ⸻ 📌 Who This Video Is For • Java / Spring Boot Developers • Software Engineers preparing for interviews • Students learning OOP • Engineers improving system design & architecture