Top 100 Next JS Interview Questions

Here’s a list of 100 potential interview questions related to Next.js, covering various aspects such as fundamentals, features, performance, deployment, and best practices.

Basic Concepts Top 100 Next JS Interview Questions

1. What is Next.js?
2. How does Next.js differ from React?
3. What are the key features of Next.js?
4. Explain the concept of server-side rendering (SSR) in Next.js.
5. What is static site generation (SSG) in Next.js?
6. How does Next.js handle routing?
7. What is the purpose of the pages directory in a Next.js application?
8. How do you create dynamic routes in Next.js?
9. What is the getStaticProps function?
10. What is the getServerSideProps function?

Data Fetching Top 100 Next JS Interview Questions

11. How do you fetch data in a Next.js application?
12. What is the difference between getStaticProps and getServerSideProps?
13. When would you use getStaticPaths?
14. How can you handle API calls in Next.js?
15. What are the benefits of using getInitialProps?

Performance Optimization

16. How does Next.js optimize performance?
17. What is code splitting in Next.js?
18. How can you implement image optimization in Next.js?
19. What is the purpose of the next/image component?
20. How can you improve the loading speed of a Next.js application?

Deployment

21. How do you deploy a Next.js application?
22. What are some popular hosting options for Next.js?
23. How does Vercel support Next.js applications?
24. What is the purpose of the next.config.js file?
25. How can you set up environment variables in Next.js?

Advanced Features

26. What is API routing in Next.js?
27. How do you create a custom server in Next.js?
28. What is the purpose of middleware in Next.js?
29. How can you implement authentication in a Next.js application?
30. What are the benefits of using TypeScript with Next.js?

Styling and Theming

31. How can you style a Next.js application?
32. What are CSS Modules, and how do they work in Next.js?
33. How can you use styled-components in Next.js?
34. What is the purpose of global styles in Next.js?
35. How can you implement theming in a Next.js application?

SEO and Accessibility

36. How does Next.js help with SEO?
37. What is the next/head component used for?
38. How can you implement Open Graph tags in Next.js?
39. What are some best practices for accessibility in Next.js?
40. How can you manage meta tags in a Next.js application?

Testing

41. How do you test a Next.js application?
42. What testing libraries are commonly used with Next.js?
43. How can you perform end-to-end testing in a Next.js application?
44. What is the role of Jest in testing Next.js applications?
45. How can you mock API calls in tests?

State Management

46. How can you manage state in a Next.js application?
47. What are some popular state management libraries compatible with Next.js?
48. How can you use React Context API in Next.js?
49. What is the role of Redux in a Next.js application?
50. How can you implement local storage in a Next.js app?

Internationalization

51. How does Next.js support internationalization (i18n)?
52. What is the purpose of the next-i18next library?
53. How can you manage translations in a Next.js application?
54. What are some best practices for implementing i18n in Next.js?
55. How can you detect the user’s locale in Next.js?

Security

56. What are some common security practices for Next.js applications?
57. How can you prevent XSS attacks in a Next.js app?
58. What is Content Security Policy (CSP), and how can you implement it in Next.js?
59. How can you secure API routes in Next.js?
60. What is the role of HTTPS in securing a Next.js application?

Miscellaneous

61. What is the purpose of the next/link component?
62. How can you implement lazy loading in Next.js?
63. What are the differences between Link and NavLink in Next.js?
64. How can you handle 404 pages in Next.js?
65. What is the next/script component used for?

Community and Ecosystem

66. What are some popular libraries and tools in the Next.js ecosystem?
67. How can you contribute to the Next.js community?
68. What are some common challenges developers face when using Next.js?
69. How do you stay updated with the latest Next.js features and best practices?
70. What are some notable companies using Next.js?

Real-World Scenarios

71. How would you approach optimizing a large Next.js application?
72. Describe a situation where you had to debug a Next.js application.
73. How can you handle user authentication in a Next.js app?
74. What strategies would you use to manage large datasets in Next.js?
75. How do you implement pagination in a Next.js application?

Performance Monitoring

76. What tools can you use to monitor the performance of a Next.js application?
77. How can you analyze the bundle size of a Next.js app?
78. What is the role of Lighthouse in assessing Next.js performance?
79. How can you track user interactions in a Next.js application?
80. What are some common performance bottlenecks in Next.js?

API Integration

81. How do you integrate third-party APIs in a Next.js application?
82. What are some best practices for handling API responses in Next.js?
83. How can you implement caching for API calls in Next.js?
84. What is the role of SWR in data fetching for Next.js?
85. How can you handle rate limiting when working with APIs in Next.js?

Customization

86. How can you customize the Next.js webpack configuration?
87. What are some ways to extend Next.js functionality with plugins?
88. How can you create a custom error page in Next.js?
89. What is the purpose of the next/babel package?
90. How can you implement a custom document in Next.js?

User Experience

91. How can you improve the user experience in a Next.js application?
92. What are some techniques for enhancing the loading experience in Next.js?
93. How can you implement a responsive design in a Next.js app?
94. What is the role of service workers in a Next.js application?
95. How can you create a progressive web app (PWA) with Next.js?

Future of Next.js

96. What are some upcoming features in Next.js that you are excited about?
97. How do you see the evolution of Next.js impacting web development?
98. What trends do you foresee in the Next.js community?
99. How can you prepare for changes in the Next.js framework?
100. What advice would you give to someone starting with Next.js

Top 50 devops questions and answer in 2025