ReactJS Interview Questions For Freshers

What is the significance of using fragments in React 16?

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What is the significance of using Fragments in React 16?

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What is the purpose of the key prop in React lists?

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What is the significance of keys in React?

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What is the difference between React and ReactDOM?

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Explain the concept of virtual DOM in ReactJS.

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What is a React component?

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What is JSX?

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What is ReactJS?

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What are the advantages of using ReactJS?

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ReactJS Intermediate Interview Questions

What is the purpose of React.PureComponent?

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How do you update the state in React?

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What is the significance of using keys in dynamic lists in React?

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What are the advantages of using React hooks?

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How do you prevent component rendering in React?

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What is the purpose of the useEffect() hook in React?

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How do you perform testing in React?

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What is the difference between class components and functional components in React?

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How do you bind event handlers in React?

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How do you perform code splitting in React?

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What is the significance of the React dev tools?

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How do you handle context in React?

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What are React hooks and how do they work?

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How do you optimize performance in React?

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What is the purpose of the React.StrictMode component?

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What is the purpose of the useState() hook in React?

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What are the limitations of React?

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Explain the concept of state in React.

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What is PropTypes in React?

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How do you debug React applications?

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What is the purpose of using React Router?

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What are controlled and uncontrolled components in React?

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What is the significance of the React.Fragment syntax?

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What are the lifecycle methods in React?

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What is Redux and how does it work with React?

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What is the difference between controlled and uncontrolled components?

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What are React Fragments and why are they used?

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How do you handle events in React?

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How do you pass data between components in React?

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What is the significance of the shouldComponentUpdate() method in React?

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What are the different ways to handle forms in React?

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ReactJS Interview Questions For Experienced

Explain the concept of SSR (Server-Side Rendering) in React.

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What is the purpose of using the useCallback() hook in React?

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Explain the concept of error boundaries in React.

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What is the role of the Promise object in React?

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Explain the concept of suspense in React.

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How do you optimize the performance of a React application?

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Explain the concept of memoization in React.

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How do you perform server-side rendering in React?

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What is the purpose of the useContext() hook in React?

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Explain the concept of forwarding refs in React.

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Explain the concept of lazy loading in React.

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What is the purpose of using memoization in React?

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Explain the concept of code splitting in React.

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How do you handle authentication in React?

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Explain the concept of reconciliation in React.

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Explain the concept of portals in React.

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What does the useReducer() hook do in React?

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What is the role of useMemo() hook in React?

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What is the significance of useCallback() hook in React?

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Explain the concept of hooks in React.

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What is a higher-order component (HOC) in React?

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How do you perform server-side rendering with React?

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What is the useRef() hook used for in React?

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Explain the concept of lazy loading in React.

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What is React Fiber?

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How do you handle errors in React?

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What is the purpose of the dangerouslySetInnerHTML attribute in React?

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Explain the concept of portals in React.

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Explain the purpose of React.memo() in React.

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Explain React context and how it is used.

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