Refined Abstraction:?

Short answer: The Circle class is a refined abstraction that extends the Shape class and provides the implementation for the Draw() method. It uses the passed IDrawingAPI to draw the circle. public class Circle : Shape

Example code

{
private double _x, _y, _radius;
public Circle(double x, double y, double radius, IDrawingAPI drawingAPI) : base(drawingAPI) {
_x = x;
_y = y;
_radius = radius;
}
public override void Draw() => _drawingAPI.DrawCircle(_x, _y, _radius); }

Real-world example (ShopNest)

Use a GoF pattern in ShopNest only when it removes duplication or makes a change safer—explain the problem it solves in the interview.

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.