04-SOLID Design Principles Explained Master SRP, OCP, LSP, ISP, and DIP for maintainable object-oriented code 📅 Mar 11, 2026 📝 Topics Covered 1. What are the SOLID Principles? 2. The Symptoms of Bad Code 3. The Motivation Behind SOLID 4. The SOLID Principles Explained S: Single Responsibility Principle (SRP) O: Open-Closed Principle (OCP) L: Liskov Substitution Principle (LSP) I: Interface Segregation Principle (ISP) D: Dependency Inversion Principle (DIP) 5. The Cost of Violation vs. Benefits of Adherence 6. Practical Exercise: Data Munging