Composite (Directory):?

Short answer: The Directory class represents the composite component in the tree structure. It can contain files or other directories. The Add() method is used to add components (both files and directories) to the directory. The ShowInfo() method iterates through its children and displays their information. public class Directory : IFileSystemComponent

Example code

{
private string _name;
private List<IFileSystemComponent> _children = new
List<IFileSystemComponent>();
public Directory(string name) => _name = name;
public void Add(IFileSystemComponent component) => _children.Add(component); public void ShowInfo()
{ Console.WriteLine($"Directory: {_name}"); foreach (var child in _children)
{ child.ShowInfo(); }
}
}

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.