React's useEffect Dependency Analysis:?

Short answer: If using hooks, make sure you are providing the correct dependencies to useEffect and useMemo, and avoid unnecessary recalculations.

Real-world example (ShopNest)

ShopNest’s cart icon uses useState for count and useEffect to load the cart once on mount.

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.