Top 30+ Next.js Interview Questions (2025)

By Jitendra kumar

Ace your Next.js interview prep with PageEngineer! Explore 30+ objective questions on React, server-side rendering, routing, API handling, performance, and deployment. Updated for 2025 to boost your web development career success.

Q1: What is Next.js primarily used for?

Q2: Which command is used to create a new Next.js project?

Q3: What is the purpose of the `pages` directory in a Next.js project?

Q4: What does server-side rendering (SSR) in Next.js offer?

Q5: Which function is used for fetching data on the server side in Next.js?

Q6: What is the difference between `getStaticProps` and `getServerSideProps`?

Q7: What is the purpose of the `_app.js` file in Next.js?

Q8: How can you link between pages in Next.js?

Q9: What is the purpose of the `next/image` component?

Q10: How do you define API routes in Next.js?

Q11: Which hook is most suitable for performing side effects in Next.js components?

Q12: What is Next.js Fast Refresh?

Q13: What is the purpose of `next.config.js`?

Q14: How can you deploy a Next.js application to Vercel?

Q15: What is Incremental Static Regeneration (ISR) in Next.js?

Q16: Which of the following is NOT a benefit of using Next.js?

Q17: What is the purpose of the `useRouter` hook in Next.js?

Q18: How do you handle environment variables in a Next.js application?

Q19: What is the purpose of the `public` directory in Next.js?

Q20: Which component is used for handling metadata (title, description, etc.) in Next.js pages?

Q21: What is the purpose of the `_document.js` file in Next.js?

Q22: How does Next.js handle code splitting?

Q23: What is Middleware in Next.js?

Q24: What is the recommended approach for styling Next.js components?

Q25: What is the purpose of Next.js Layouts?

Q26: When should you choose `getStaticPaths` with `getStaticProps`?

Q27: What does the term 'Hybrid Static & Server Rendering' refer to in Next.js?

Q28: How do you handle errors and exceptions in Next.js?

Q29: What's the main advantage of using Next.js API Routes?

Q30: What are Server Actions in Next.js 14+?

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