Mid From PDF GoF Patterns Gang of Four Patterns

Usage: ○ In the Program class, you create instances of Circle with different drawing?

Short answer: PIs (DrawingAPI1 and DrawingAPI2). The client code can easily switch between different rendering styles without changing the shape itself. PIs (DrawingAPI1 and DrawingAPI2). The client code can easily switch between different rendering styles without changing the shape itself. class Program { static void Main() { Shape circle1 = new Circle(5, 10, 2, new…… DrawingAPI1()); Shape circle2 = new Circle(5, 10, 2, new…

Explain a bit more

DrawingAPI2()); circle1.Draw(); // Outputs: Drawing Circle at (5, 10) with radius 2 using API 1.

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.
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