How to use the Next.js MCQ Quiz
- 1. Choose the length10 random Next.js questions, or all 25. Untick shuffle for a fixed order.
- 2. AnswerPick an option and see straight away whether it's right, with a one-line reason.
- 3. See your scoreFinish to get your score and a review of every question with the correct answer.
What the quiz covers
Next.js is the most popular React framework, and its App Router changed how React apps fetch data and render, which interviews now ask about. The 25 questions are grouped into 11 areas, shown above each question: Basics, Routing, Rendering, APIs, Data, Optimisation, SEO, Config, Core, Tooling, Deployment.
A sample question explained
"When do you need 'use client'?" The answer is For components using state, effects, event handlers or browser APIs. Keep client components small. Keeping most components on the server and only small interactive pieces on the client is the main performance idea of the App Router.
More questions you'll meet
A few of the other Next.js questions in the bank:
- What is layout.tsx for?
- Which file handles errors in a route segment?
- Which component should you use for optimised images?
- What does SSR mean?
- Which environment variables are exposed to the browser?
- What does next build do?
- What is the Pages Router?
Study tips
- Build a two-page App Router project with a dynamic route and a Route Handler.
- Be ready to explain when data is fetched on the server versus in the browser.
- Aim for at least 20 out of 25 on two separate attempts before you treat Next.js as revised; one lucky score can hide gaps.
Questions and options are shuffled on each attempt, so a retake is a fresh test. The Next.js questions were written by Uncodemy for practice; they aren't copied from any exam or company test.
Frequently asked questions
App Router or Pages Router?
The quiz focuses on the App Router, with one question about the Pages Router.
Which version?
Next.js 14 and 15.
Is the Next.js MCQ quiz free?
Yes. Every question in the Next.js MCQ quiz can be answered without signing up. When you finish your first round, we ask once for your name and WhatsApp number to show your score; after that the Next.js MCQ quiz and every other Uncodemy tool open straight away.