What is the difference between state and props?

Short answer: Feature Props State Mutable? ❌ No (read-only) ✅ Yes Who sets it? Parent component Component itself Used for Passing data Handling internal data

Real-world example (ShopNest)

ProductCard receives price via props. The parent Catalog owns selected filters in state and passes them down.

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.