Well, I have been working as a Front-end developer for the last 7 years. I am sharing 100 questions that were asked in my recent interviews. I think it may be helpful for you guys who are preparing for any such interviews.

Here are some potential questions you might be asked in a senior React developer interview:

1. Explain the concept of Virtual DOM in React.
2. What is JSX and how does it differ from HTML?
3. What are the lifecycle methods in React?
4. What are hooks in React? Can you provide examples of how you've used them?
5. How do you handle state in React?
6. What is Redux and how have you used it in your projects?
7. What are the differences between class components and functional components?
8. How do you handle forms in React?
9. What is context in React and how have you used it?
10. How do you handle error boundaries in React?
11. What are higher-order components?
12. How do you optimize performance in a React application?
13. What is the difference between setState and forceUpdate?
14. What are the differences between controlled and uncontrolled components?
15. How do you handle asynchronous calls in React?
16. What is prop drilling and how do you avoid it?
17. What are keys in React and why are they important?
18. What is the difference between shouldComponentUpdate and componentDidUpdate?
19. How do you test your React applications?
20. What is the role of render in React?
21. What are the differences between React.Fragment and <div>?
22. What is the purpose of super(props) in a constructor?
23. What is the difference between state and props?
24. What is the use of refs in React?
25. What is the difference between createElement and cloneElement?
26. Explain how React Router works.
27. What is the difference between PureComponent and Component in React?
28. How do you handle side effects in React?
29. What is the concept of "Lifting State Up" in React?
30. What is the difference between useState and useReducer? When would you use one over the other?
31. What is the purpose of useMemo and useCallback hooks?
32. How do you handle global state management without using Redux or MobX?
33. What is the difference between mount, render and shallow in Enzyme testing?
34. What is the concept of "controlled" vs "uncontrolled" components in React?
35. How do you handle server-side rendering or universal rendering in React?
36. What is the role of React.PureComponent and when would you use it?
37. What is the difference between useEffect and useLayoutEffect?
38. What is the purpose of React.forwardRef?
39. How do you handle component re-render optimization?
40. What is the Suspense component and how do you use it?
41. What is Concurrent Mode in React?
42. What are React Portals and where can they be useful?
43. What is the difference between useRef and createRef?
44. How do you handle type checking in React?
45. What is the purpose of the key prop in React lists?
46. What are the common patterns for sharing stateful logic in a component?
47. What is the difference between element and component in React?
48. What is the purpose of defaultProps?
49. How do you handle animations in React?
50. What is the role of React.Children API
51. What is the difference between useMemo and useEffect?
52. How do you handle internationalization (i18n) in React?
53. What is the purpose of React.lazy?
54. What is the difference between useCallback and useMemo?
55. How do you handle CSS in your React applications?
56. What is the concept of "props spreading" in React?
57. What is the difference between useRef and useState?
58. What is the purpose of React.StrictMode?
59. What is the difference between React.memo and React.PureComponent?
60. What is the purpose of React.Profiler?
61. What is the difference between React.createRef and callback refs?
62. What is the purpose of React.Fragment and when would you use it?
63. What is the difference between React.cloneElement and React.Children.map?
64. What is the purpose of React.isValidElement?
65. What is the difference between React.Children.only and React.Children.toArray?
66. What is the purpose of React.Children.count?
67. What is the difference between React.Children.forEach and React.Children.map?
68. What is the purpose of React.createContext?
69. What is the difference between React.Component and React.PureComponent?
70. What is the purpose of React.SuspenseList?
71. What is the difference between React.useImperativeHandle and React.useRef?
72. What is the purpose of React.useDebugValue?
73. What is the difference between React.useLayoutEffect and React.useEffect?
74. What is the purpose of React.useReducer?
75. What is the difference between React.useState and React.useReducer?
76. How do you handle accessibility (a11y) in your applications?
77. What are some ways to improve web page performance?
78. What is the critical rendering path?
79. How do you ensure your websites are mobile-friendly?
80. What are some SEO best practices you follow when developing a web application?
81. What are Service Workers and how have you used them?
82. What is the difference between == and === in JavaScript?
83. What are JavaScript Promises and how do you use them?
84. What is the Event Loop in JavaScript?
85. What are the different ways to declare a function in JavaScript?
86. What is the difference between null and undefined in JavaScript?
87. What is CORS and how does it affect your applications?
88. What is the difference between let, const and var?
89. What is a closure in JavaScript?
90. What is the difference between map, reduce and filter methods in JavaScript?
91. What is the prototype chain in JavaScript?
92. What is the difference between a shallow copy and a deep copy in JavaScript?
93. What is event delegation in JavaScript and why is it useful?
94. What is hoisting in JavaScript?
95. What is the difference between synchronous and asynchronous programming in JavaScript?
96. How do you handle error and exception handling in JavaScript?
97. What is the concept of "this" in JavaScript?
98. What is the difference between a REST API and a GraphQL API?
99. What is your approach to debugging issues in a web application?
100. How do you stay updated with the latest developments in the front-end ecosystem?