How does Strategy pattern differ from State pattern?

Short answer: Aspect Strategy Pattern State Pattern Purpose Encapsulates interchangeable behaviors (algorithms).

Explain a bit more

Encapsulates states and transitions between them. Client Control Client decides which strategy to use. Object changes its own state internally. Behavior Switch Switched externally (e.g., passed as a parameter). Switched internally (e.g., via method call). Example Payment method selection. Document lifecycle (Draft → Published → Archived). Repository Design Pattern

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.