Text Editor (Undo/Redo Functionality):?

Short answer: In a text editor (such as Microsoft Word or Notepad), users can press Ctrl + Z to undo the most recent changes. Each time the user types, the editor saves a snapshot of the text as a Memento. Pressing Ctrl + Z restores the text to its previous state.

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.