How does encapsulation differ from abstraction?

Short answer: Encapsulation → Hides internal data, focuses on data protection. Abstraction → Hides implementation details, focuses on simplifying complex systems.

Real-world example (ShopNest)

ShopNest’s Order keeps _items private and exposes AddItem() so totals stay correct—callers cannot put a negative quantity directly into the list.

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.