Explain the difference between Class and Functional components.

Short answer: Feature Class Component Functional Component Syntax ES6 Class Function State this.state useState hook Lifecycle methods Yes Use useEffect, etc. Code size More verbose Cleaner and shorter ✅ Example: Class:

Example code

class Welcome extends React.Component { render() { return <h1>Hello, {this.props.name}</h1>;
}
} Functional: function Welcome(props) { return <h1>Hello, {props.name}</h1>;
}

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.