Interface Segregation Principle Explained in 60 Seconds! | SOLID #Shorts #interview

Learn the Interface Segregation Principle (ISP) — the fourth rule of the SOLID design principles in Object-Oriented Programming.

💡 Definition:

Clients should not be forced to depend on interfaces they do not use.

In simple terms:
Instead of one big “fat interface,” create smaller, focused interfaces so classes depend only on what they actually need.

👨‍💻 Example in the video:
A real-life restaurant-style example showing how one large interface leads to messy, hard-to-maintain code — and how splitting responsibilities makes everything cleaner.

🎯 Why ISP matters:

Prevents bloated, confusing interfaces

Reduces unnecessary method implementations

Makes testing and code maintenance easier

Encourages clean and modular architecture

📌 Topics Covered:

What is ISP?

Real-world analogy

Common mistakes developers make

How ISP fits into the full SOLID principles

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