React Interview Question Answer
Question : 1 What is React.js?
Question : 2 What are the key features of React.js?
Question : 3 What is JSX?
Question : 4 What is the difference between React and ReactDOM?
Question : 5 Explain the concept of Virtual DOM in React.
Question : 6 What are the lifecycle methods in React?
Question : 7 What is the significance of render() in React?
Question : 8 What is the purpose of setState()?
Question : 9 What is the difference between state and props in React?
Question : 10 What is the purpose of keys in React lists?
Question : 11 What is the significance of the useEffect hook in React?
Question : 12 What is the difference between controlled and uncontrolled components in React?
Question : 13 What is React Router?
Question : 14 What is the purpose of componentDidMount() lifecycle method?
Question : 15 What is the significance of the key prop in React?
Question : 16 What are React refs?
Question : 17 What are React hooks?
Question : 18 Explain the concept of conditional rendering in React.
Question : 19 What is the purpose of the setState() callback function?
Question : 20 What is the significance of the useCallback hook?
Question : 21 How can you optimize performance in React?
Question : 22 What is the purpose of the React.Fragment component?
Question : 23 Explain the concept of prop drilling.
Question : 24 What is the significance of the useReducer hook?
Question : 25 How can you handle forms in React?
What is React.js?
What are the key features of React.js?
Question : 3 What is JSX?
Question : 4 What is the difference between React and ReactDOM?
Question : 5 Explain the concept of Virtual DOM in React.
Question : 6 What are the lifecycle methods in React?
Question : 7 What is the significance of render() in React?
Question : 8 What is the purpose of setState()?
Question : 9 What is the difference between state and props in React?
Question : 10 What is the purpose of keys in React lists?
Question : 11 What is the significance of the useEffect hook in React?
Question : 12 What is the difference between controlled and uncontrolled components in React?
Question : 13 What is React Router?
Question : 14 What is the purpose of componentDidMount() lifecycle method?
Question : 15 What is the significance of the key prop in React?
Question : 16 What are React refs?
Question : 17 What are React hooks?
Question : 18 Explain the concept of conditional rendering in React.
Question : 19 What is the purpose of the setState() callback function?
Question : 20 What is the significance of the useCallback hook?
Question : 21 How can you optimize performance in React?
Question : 22 What is the purpose of the React.Fragment component?
Question : 23 Explain the concept of prop drilling.
Question : 24 What is the significance of the useReducer hook?
Question : 25 How can you handle forms in React?
What is JSX?
What is the difference between React and ReactDOM?
Question : 5 Explain the concept of Virtual DOM in React.
Question : 6 What are the lifecycle methods in React?
Question : 7 What is the significance of render() in React?
Question : 8 What is the purpose of setState()?
Question : 9 What is the difference between state and props in React?
Question : 10 What is the purpose of keys in React lists?
Question : 11 What is the significance of the useEffect hook in React?
Question : 12 What is the difference between controlled and uncontrolled components in React?
Question : 13 What is React Router?
Question : 14 What is the purpose of componentDidMount() lifecycle method?
Question : 15 What is the significance of the key prop in React?
Question : 16 What are React refs?
Question : 17 What are React hooks?
Question : 18 Explain the concept of conditional rendering in React.
Question : 19 What is the purpose of the setState() callback function?
Question : 20 What is the significance of the useCallback hook?
Question : 21 How can you optimize performance in React?
Question : 22 What is the purpose of the React.Fragment component?
Question : 23 Explain the concept of prop drilling.
Question : 24 What is the significance of the useReducer hook?
Question : 25 How can you handle forms in React?
Explain the concept of Virtual DOM in React.
What are the lifecycle methods in React?
Question : 7 What is the significance of render() in React?
Question : 8 What is the purpose of setState()?
Question : 9 What is the difference between state and props in React?
Question : 10 What is the purpose of keys in React lists?
Question : 11 What is the significance of the useEffect hook in React?
Question : 12 What is the difference between controlled and uncontrolled components in React?
Question : 13 What is React Router?
Question : 14 What is the purpose of componentDidMount() lifecycle method?
Question : 15 What is the significance of the key prop in React?
Question : 16 What are React refs?
Question : 17 What are React hooks?
Question : 18 Explain the concept of conditional rendering in React.
Question : 19 What is the purpose of the setState() callback function?
Question : 20 What is the significance of the useCallback hook?
Question : 21 How can you optimize performance in React?
Question : 22 What is the purpose of the React.Fragment component?
Question : 23 Explain the concept of prop drilling.
Question : 24 What is the significance of the useReducer hook?
Question : 25 How can you handle forms in React?
What is the significance of render() in React?
What is the purpose of setState()?
Question : 9 What is the difference between state and props in React?
Question : 10 What is the purpose of keys in React lists?
Question : 11 What is the significance of the useEffect hook in React?
Question : 12 What is the difference between controlled and uncontrolled components in React?
Question : 13 What is React Router?
Question : 14 What is the purpose of componentDidMount() lifecycle method?
Question : 15 What is the significance of the key prop in React?
Question : 16 What are React refs?
Question : 17 What are React hooks?
Question : 18 Explain the concept of conditional rendering in React.
Question : 19 What is the purpose of the setState() callback function?
Question : 20 What is the significance of the useCallback hook?
Question : 21 How can you optimize performance in React?
Question : 22 What is the purpose of the React.Fragment component?
Question : 23 Explain the concept of prop drilling.
Question : 24 What is the significance of the useReducer hook?
Question : 25 How can you handle forms in React?
What is the difference between state and props in React?
What is the purpose of keys in React lists?
Question : 11 What is the significance of the useEffect hook in React?
Question : 12 What is the difference between controlled and uncontrolled components in React?
Question : 13 What is React Router?
Question : 14 What is the purpose of componentDidMount() lifecycle method?
Question : 15 What is the significance of the key prop in React?
Question : 16 What are React refs?
Question : 17 What are React hooks?
Question : 18 Explain the concept of conditional rendering in React.
Question : 19 What is the purpose of the setState() callback function?
Question : 20 What is the significance of the useCallback hook?
Question : 21 How can you optimize performance in React?
Question : 22 What is the purpose of the React.Fragment component?
Question : 23 Explain the concept of prop drilling.
Question : 24 What is the significance of the useReducer hook?
Question : 25 How can you handle forms in React?
What is the significance of the useEffect hook in React?
What is the difference between controlled and uncontrolled components in React?
Question : 13 What is React Router?
Question : 14 What is the purpose of componentDidMount() lifecycle method?
Question : 15 What is the significance of the key prop in React?
Question : 16 What are React refs?
Question : 17 What are React hooks?
Question : 18 Explain the concept of conditional rendering in React.
Question : 19 What is the purpose of the setState() callback function?
Question : 20 What is the significance of the useCallback hook?
Question : 21 How can you optimize performance in React?
Question : 22 What is the purpose of the React.Fragment component?
Question : 23 Explain the concept of prop drilling.
Question : 24 What is the significance of the useReducer hook?
Question : 25 How can you handle forms in React?
What is React Router?
What is the purpose of componentDidMount() lifecycle method?
Question : 15 What is the significance of the key prop in React?
Question : 16 What are React refs?
Question : 17 What are React hooks?
Question : 18 Explain the concept of conditional rendering in React.
Question : 19 What is the purpose of the setState() callback function?
Question : 20 What is the significance of the useCallback hook?
Question : 21 How can you optimize performance in React?
Question : 22 What is the purpose of the React.Fragment component?
Question : 23 Explain the concept of prop drilling.
Question : 24 What is the significance of the useReducer hook?
Question : 25 How can you handle forms in React?
What is the significance of the key prop in React?
What are React refs?
Question : 17 What are React hooks?
Question : 18 Explain the concept of conditional rendering in React.
Question : 19 What is the purpose of the setState() callback function?
Question : 20 What is the significance of the useCallback hook?
Question : 21 How can you optimize performance in React?
Question : 22 What is the purpose of the React.Fragment component?
Question : 23 Explain the concept of prop drilling.
Question : 24 What is the significance of the useReducer hook?
Question : 25 How can you handle forms in React?
What are React hooks?
Explain the concept of conditional rendering in React.
Question : 19 What is the purpose of the setState() callback function?
Question : 20 What is the significance of the useCallback hook?
Question : 21 How can you optimize performance in React?
Question : 22 What is the purpose of the React.Fragment component?
Question : 23 Explain the concept of prop drilling.
Question : 24 What is the significance of the useReducer hook?
Question : 25 How can you handle forms in React?
What is the purpose of the setState() callback function?
What is the significance of the useCallback hook?
Question : 21 How can you optimize performance in React?
Question : 22 What is the purpose of the React.Fragment component?
Question : 23 Explain the concept of prop drilling.
Question : 24 What is the significance of the useReducer hook?
Question : 25 How can you handle forms in React?
How can you optimize performance in React?
What is the purpose of the React.Fragment component?
Question : 23 Explain the concept of prop drilling.
Question : 24 What is the significance of the useReducer hook?
Question : 25 How can you handle forms in React?
Explain the concept of prop drilling.
What is the significance of the useReducer hook?
Question : 25 How can you handle forms in React?
How can you handle forms in React?