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Top ReactJS Interview Questions

  1. What is ReactJS? Explain its key features.
  2. What are the differences between ReactJS and AngularJS?
  3. What is virtual DOM? How does it improve performance?
  4. Explain the concept of state and props in ReactJS.
  5. What is JSX in ReactJS? Why is it used?
  6. What is the role of Redux in ReactJS? Explain the basic concepts of Redux.
  7. What is the difference between controlled and uncontrolled components in ReactJS?
  8. Explain the lifecycle methods in ReactJS.
  9. What is server-side rendering? How is it useful in ReactJS?
  10. What is the significance of keys in ReactJS?
  11. How can you optimize the performance of a ReactJS application?
  12. Explain the concept of higher-order components (HOC) in ReactJS.
  13. What is the difference between ReactJS and React Native?
  14. How can you handle errors in ReactJS?
  15. Explain the concept of hooks in ReactJS.
  16. What are the differences between stateful and stateless components in ReactJS?
  17. Explain the concept of Flux in ReactJS.
  18. What is the significance of ReactJS Fiber?
  19. What is the difference between ReactJS and VueJS?
  20. What is the purpose of ReactJS context?
  21. What is the significance of the shouldComponentUpdate method in ReactJS?
  22. What is the role of ReactJS in server-side rendering?
  23. What is the significance of the react-router library in ReactJS?
  24. Explain the concept of controlled and uncontrolled forms in ReactJS.
  25. What is the significance of ReactJS Fragment?
  26. What is the difference between ReactJS and AngularJS in terms of data binding?
  27. What is the significance of the ReactJS portal feature?
  28. What is the role of ReactJS DevTools?
  29. Explain the concept of suspense in ReactJS.
  30. What is the significance of the useMemo hook in ReactJS?
  31. What is the significance of the useCallback hook in ReactJS?
  32. What is the significance of the useContext hook in ReactJS?
  33. What is the significance of the useReducer hook in ReactJS?
  34. What is the difference between ReactJS and ReactJS Native?
  35. Explain the concept of lazy loading in ReactJS.
  36. What is the significance of ReactJS PureComponents?
  37. Explain the concept of forwardRef in ReactJS.
  38. What is the significance of the ReactJS strict mode feature?
  39. What is the role of the ReactJS suspense component?
  40. Explain the concept of the ReactJS StrictMode component.
  41. What is the role of the shouldComponentUpdate lifecycle method in ReactJS?
  42. What is the role of the componentWillUnmount lifecycle method in ReactJS?
  43. What is the role of the componentDidCatch lifecycle method in ReactJS?
  44. What is the role of the getDerivedStateFromProps lifecycle method in ReactJS?
  45. What is the role of the getSnapshotBeforeUpdate lifecycle method in ReactJS?
  46. What is the role of the componentDidUpdate lifecycle method in ReactJS?
  47. What is the significance of ReactJS memoization?
  48. Explain the concept of the useContext hook in ReactJS.
  49. What is the significance of ReactJS error boundaries?
  50. What is the role of the ReactJS PureComponent?
  51. What is the difference between ReactJS and ReactJS DOM?
  52. What is the difference between ReactJS and EmberJS?
  53. What is the role of the ReactJS ReactDOM library?
  54. What is the role of the ReactJS PropTypes library?
  55. What is the role of the ReactJS Fragment component?
  56. What is the significance of the ReactJS ref feature?
  57. Explain the concept of the ReactJS Class component.
  58. What is the role of the ReactJS Function component?
  59. What is the difference between ReactJS and BackboneJS?
  60. What is the significance of the ReactJS state hook?
  61. What is the role of the ReactJS useEffect hook?
  62. What is the role of the ReactJS useLayoutEffect hook?
  63. What is the role of the ReactJS useImperativeHandle hook?
  64. What is the role of the ReactJS useCallback hook?
  65. What is the role of the ReactJS useMemo hook?
  66. What is the role of the ReactJS useRef hook?
  67. What is the role of the ReactJS useReducer hook?
  68. What is the role of the ReactJS
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