What is meant by the uniform interface in RESTful services?

Short answer: The uniform interface ensures that REST APIs follow consistent conventions for communication, making them predictable and easy to use. Key aspects: Use of standard HTTP methods (GET, POST, PUT, DELETE). Resource identification via URIs. Resource representations (JSON, XML). Self-descriptive messages.

Real-world example (ShopNest)

Creating an order is POST /api/orders → 201 with Location header. Fetching is GET /api/orders/{id} → 200 or 404.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.