Recursive Structure:?

Short answer: The ShowInfo() method in Directory calls ShowInfo() on all its child components. This is where the recursive nature of the Composite Pattern comes into play. It doesn’t matter whether the child is a File or another Directory; both types implement the ShowInfo() method, and the directory simply iterates over its children. Key Benefits of the Composite Pattern:

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.