Concrete Class (PastaRecipe):?

Short answer: The PastaRecipe class is a concrete subclass that implements the specific details of the steps defined in the abstract Recipe class.

Explain a bit more

The steps like gathering ingredients, preparing, and cooking are all tailored to pasta. public class PastaRecipe : Recipe { protected override void GatherIngredients() { Console.WriteLine("Gathering pasta, sauce, and cheese."); } protected override void Prepare() { Console.WriteLine("Boiling pasta and preparing sauce."); } protected override void CookMethod() { Console.WriteLine("Cooking pasta with sauce."); }

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.