React Interview Preparation: Best Questions, Best Answers, and Sample Code 1. What are the differences between functional and class components in React? Answer : Functional components are simpler and mainly focus on rendering UI, while class components provide more powerful features like state management and lifecycle methods. In recent versions of React, hooks ( useState ,  useEffect ) enable functional components to use state and lifecycle features without needing to be classes. // Functional Component function FunctionalComponent(props) {     const [count, setCount] = useState(0);     return (         <div>             <p>Count: {count}</p>             <button onClick={() => setCount(count + 1)}>Increment</button>         </div>     ); } // Class Component class ClassComponent extends React.Component {     constructor(props) {         super(props);         this.state = { count: 0 };     }     increment = () => {         this.setState({ count

In the dynamic landscape of web development, React has emerged as a game-changer, empowering developers to create interactive and efficient user interfaces. This comprehensive guide will take you on a journey through the fundamentals of React, providing hands-on examples to solidify your understanding. Understanding the Basics What is React? React is a JavaScript library for building user interfaces, developed by Facebook. It allows developers to create reusable UI components, making it easier to manage complex interfaces and maintain a structured codebase. Setting Up Your React Environment To get started with React, you'll need Node.js and npm installed on your machine. Create a new React app using: npx create-react-app my-react-app cd my-react-app npm start Components and Props Components in React Components are the building blocks of React applications. They can be functional or class-based, representing different parts of the UI. Let's create a simple functional component: