Deployment & Environment Variables in Next.js Quiz – 15 Questions with Answers
15 questions · 12 min · Medium
Middleware in Next.js
Test your knowledge of Middleware in Next.js, including request interception, authentication, redirects, rewrites, cookies, headers, matchers, and middleware configuration.
- 15
- Questions
- 12 min
- Time limit
- Medium
- Difficulty
No sign-up needed · Last updated:
Score: 0 00:00
Save your score
Create a free account to keep your scores and track your progress. It is optional.
Questions to review
Related quizzes
Dynamic Routing & Catch-all Routes in Next.js
15 questions · 12 min · Medium
Next.js API Routes & Server Actions Quiz – 20 Questions with Answers
20 questions · 15 min · Medium
Data Fetching (SSR, SSG, ISR) in Next.js Quiz – 15 Questions with Answers
15 questions · 12 min · Medium
Image & Font Optimization in Next.js
15 questions · 12 min · Medium
State Management in Next.js Quiz
15 questions · 12 min · Medium
All 15 questions and answers Spoilers: this shows the questions and answers. Try the quiz first! Open
-
1. What is the primary purpose of Middleware in Next.js?
- A. To intercept and process requests before they reach a route
- B. To create database tables
- C. To compile CSS files
- D. To replace React components
Show answer
A. To intercept and process requests before they reach a route
Middleware can run logic on incoming requests before the request is handled by the destination route.
-
2. Which function is commonly used to create a Next.js middleware response?
- A. NextResponse
- B. NextMiddleware
- C. ResponseNext
- D. MiddlewareResponse
Show answer
A. NextResponse
NextResponse provides helpers for creating responses, redirects, rewrites, and other middleware behavior.
-
3. Which object provides information about the incoming request in Next.js Middleware?
- A. NextRequest
- B. NextRoute
- C. RequestContext
- D. NextContext
Show answer
A. NextRequest
NextRequest extends the standard Request API with Next.js-specific functionality useful in Middleware.
-
4. Which function can be used to allow a request to continue to its destination?
- A. NextResponse.next()
- B. NextResponse.continue()
- C. NextResponse.forward()
- D. NextResponse.allow()
Show answer
A. NextResponse.next()
NextResponse.next() indicates that processing should continue to the next stage of the request.
-
5. Which Next.js Middleware feature is commonly used to send a user to another URL?
- A. redirect
- B. forward
- C. navigate
- D. transfer
Show answer
A. redirect
NextResponse.redirect() can be used in Middleware to redirect a request to another URL.
-
6. What is a common use case for Next.js Middleware?
- A. Authentication and authorization checks
- B. Creating React components
- C. Compiling TypeScript manually
- D. Installing npm packages
Show answer
A. Authentication and authorization checks
Middleware is often used to inspect requests and apply authentication or authorization logic before allowing access.
-
7. Which Middleware feature allows a request to be internally served by a different route without changing the browser URL?
- A. Redirect
- B. Rewrite
- C. Refresh
- D. ForwardURL
Show answer
B. Rewrite
A rewrite changes the destination used to handle a request while keeping the original URL visible to the browser.
-
8. Which configuration option can be used to specify which routes Middleware should run on?
- A. routes
- B. matcher
- C. paths
- D. filter
Show answer
B. matcher
The matcher configuration allows Middleware to be applied selectively to specified URL patterns.
-
9. What can Middleware inspect from an incoming request?
- A. Cookies and headers
- B. Only React state
- C. Only database records
- D. Only CSS variables
Show answer
A. Cookies and headers
NextRequest provides access to request information such as headers, cookies, URL details, and other request properties.
-
10. Which statement about Middleware execution is correct?
- A. It runs only after the page is rendered
- B. It can run before a request reaches the destination route
- C. It runs only in the browser
- D. It is executed only when a database changes
Show answer
B. It can run before a request reaches the destination route
Middleware operates in the request-processing pipeline and can modify or respond to a request before the destination is reached.
-
11. Which file convention has traditionally been used for defining Next.js Middleware?
- A. middleware.js
- B. request.js
- C. server-middleware.js
- D. next-middleware.js
Show answer
A. middleware.js
The traditional Next.js Middleware convention uses a middleware.js or middleware.ts file at the appropriate project root location.
-
12. Which HTTP request property can be used in Middleware to inspect the requested URL?
- A. request.nextUrl
- B. request.pageUrl
- C. request.routeUrl
- D. request.currentPage
Show answer
A. request.nextUrl
NextRequest provides nextUrl, which exposes parsed URL information and Next.js-specific URL functionality.
-
13. How can Middleware commonly check whether a user has an authentication cookie?
- A. Using request.cookies
- B. Using request.authOnly
- C. Using request.sessionOnly
- D. Using request.storage
Show answer
A. Using request.cookies
Middleware can inspect cookies on the incoming request through the cookies API available on NextRequest.
-
14. What should Middleware generally do after determining that a request is allowed to continue?
- A. Call NextResponse.next()
- B. Always redirect the request
- C. Terminate the server
- D. Delete the request
Show answer
A. Call NextResponse.next()
When no redirect, rewrite, or other response is required, NextResponse.next() allows request processing to continue.
-
15. Which statement best describes the role of Next.js Middleware?
- A. It is mainly a database management layer
- B. It provides request-time logic that can influence routing and responses
- C. It replaces all API routes
- D. It is only used for styling pages
Show answer
B. It provides request-time logic that can influence routing and responses
Middleware enables request-time processing such as authentication checks, redirects, rewrites, and request or response manipulation.