Abstract Product Interfaces (Button and Checkbox):?

Short answer: The IButton and ICheckbox interfaces define the general contract for products. Each concrete product (e.g., WindowsButton, MacButton) will implement the Render method to display platform-specific UI elements. public interface IButton { void Render(); }

Example code

public interface ICheckbox { void Render(); }

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.