Atharv Gyan

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 {   ...

State management is a crucial aspect of building robust and scalable React applications. As applications grow in complexity, managing state effectively becomes increasingly challenging. In this article, we will delve into advanced state management techniques in ReactJS, exploring various libraries, patterns, and modern approaches to handle state in a more efficient and maintainable manner. 1. Redux: Redux is one of the most popular state management libraries in the React ecosystem. It follows a centralized store pattern, where all application state is stored in a single immutable state tree. Actions are dispatched to modify the state, and reducers are used to specify how the state should change in response to these actions. Advanced concepts in Redux include middleware, which allows you to intercept and process actions, and selectors, which enable efficient access to specific slices of state. 2. MobX: MobX is another powerful state management library that offers a more flexible and rea...