Next JS · Question Set

API Routes & Backend Features – Next JS interview questions

API Routes & Backend Features interview questions for placements and exams.

Subject: Next JSDifficulty: Mixed16 questions in this set

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Next JS – API Routes & Backend Features questions (16)

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1. What is a Server Action in Next.js App Router?

Difficulty: HardType: MCQTopic: Server Actions

Server Actions are async functions marked with 'use server' directive that run on the server but can be called directly from Client Components like regular functions, eliminating the need for separate API routes for many use cases. They provide a seamless way to mutate data, handle form submissions, or perform server-side operations with automatic serialization and progressive enhancement for forms that work without JavaScript. Server Actions can be defined inline in Server Components or in separate files, support TypeScript for type-safe server functions, and integrate with React's useFormStatus and useFormState hooks for optimistic updates and pending states.

2. Where do you create API routes in the Pages Router?

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API Routes & Backend Features – Next JS interview questions

Set overview

Next JS – API Routes & Backend Features questions (16)

1. What is a Server Action in Next.js App Router?

2. Where do you create API routes in the Pages Router?

Continue your preparation

3. What file name is used for Route Handlers in the App Router?

4. Where should the middleware.js file be placed in a Next.js project?

5. What prefix makes environment variables accessible in the browser in Next.js?

6. How do you handle different HTTP methods in an API route (Pages Router)?

7. How do you parse JSON request bodies in Next.js API routes?

8. How do you implement authentication middleware in Next.js and what are best practices?

9. How do you connect to a database in Next.js and what are the best practices for connection pooling?

10. What security considerations should you implement in Next.js API routes and Route Handlers?

11. When should you use Edge Runtime vs Node.js Runtime for API routes and what are the tradeoffs?

12. What is the main limitation of the Edge Runtime compared to Node.js Runtime?

13. Compare API Routes in Pages Router with Route Handlers in App Router: what are the key differences?

14. How do you create a POST endpoint using Route Handlers in App Router with request validation?

15. What are the best practices for managing environment variables in Next.js applications?

16. How do you implement form submission using Server Actions and what advantages do they provide?

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API Routes & Backend Features – Next JS interview questions

Set overview

1. What is a Server Action in Next.js App Router?

2. Where do you create API routes in the Pages Router?

Continue your preparation

3. What file name is used for Route Handlers in the App Router?

4. Where should the middleware.js file be placed in a Next.js project?

5. What prefix makes environment variables accessible in the browser in Next.js?

6. How do you handle different HTTP methods in an API route (Pages Router)?

7. How do you parse JSON request bodies in Next.js API routes?

8. How do you implement authentication middleware in Next.js and what are best practices?

9. How do you connect to a database in Next.js and what are the best practices for connection pooling?

10. What security considerations should you implement in Next.js API routes and Route Handlers?

11. When should you use Edge Runtime vs Node.js Runtime for API routes and what are the tradeoffs?

12. What is the main limitation of the Edge Runtime compared to Node.js Runtime?

13. Compare API Routes in Pages Router with Route Handlers in App Router: what are the key differences?

14. How do you create a POST endpoint using Route Handlers in App Router with request validation?

15. What are the best practices for managing environment variables in Next.js applications?

16. How do you implement form submission using Server Actions and what advantages do they provide?

More sets in Next JS

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