What are selectors in Redux?

Short answer: Selectors are functions that read and return data from the store, often with memoization.

Explain a bit more

✅ Purpose: Centralize access to state shape Avoid duplication Optimize performance ✅ Basic selector: const selectUser = (state) => state.user; ✅ With reselect: import { createSelector } from 'reselect'; const selectCartItems = (state) => state.cart.items; const selectTotalPrice = createSelector( [selectCartItems], (items) => items.reduce((sum, item) => sum + item.price, 0) ); React Routing

Real-world example (ShopNest)

ShopNest’s storefront is React: components for ProductCard, CartDrawer, and CheckoutForm, with hooks for local UI state.

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.