What are pure components?

Short answer: A Pure Component is a React class component that automatically implements shouldComponentUpdate with a shallow prop and state comparison. Benefit: It prevents unnecessary re-renders by performing a shallow comparison of props and state. Example: class MyComponent extends React.PureComponent { render() { return <div>{this.props.name}</div>;

Example code

}
} Pure components are a good choice when you know that your component only depends on props and state and you want to avoid unnecessary updates.

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.