Next js Interview Questions and Answers

Last updated on Feb 07, 2024
  • Share
Next js Interview Questions

If you are a Next JS aspirant and preparing for your next big day, continue further to get the knowledge of best Next JS interview questions with answers selected by industry experts. Greatly inspired by PHP, Next JS is a JavaScript framework that can be used to create static as well as server-side rendering web applications and websites using React library. It allows users to export application components to perform individual tests for each of them. Next JS also allows developers to download thousands of modules from npm.

  • Easy installation, project build, modification, and required package found.
  • Optimal application performance due to the availability of automatic code splitting.
  • Next JS allows optimized code bundles to be loaded lazily behind the scenes with the help of prefetching.
  • It allows application code to use SSR or Server Side Rendering, thus offering SEO friendly flexibility, initial render to application view, and elimination of code download.
  • Effective Hot-Module Replacement and powerful error reporting.

Most Frequently Asked Next js Interview Questions

Here in this article, we will be listing frequently asked Next js Interview Questions and Answers with the belief that they will be helpful for you to gain higher marks. Also, to let you know that this article has been written under the guidance of industry professionals and covered all the current competencies.

Q11. How to validate AMP in the next JS?

To validate your AMP pages, ‘amphtml-validator’ is used during the development. Warnings and fatal errors will be displayed in the terminal where the Next JS is started. AMP pages also get validated during ‘next export’ and issues will be printed in the terminal, and the ‘next export’ will fail due to the absence of proper AMP validation.

Q12. How to enable AMP in Next JS?

This one is crucial. Next JS interview question to practice and remember all its aspects. There are two processes to enable AMP in Next JS. The thing to remember here is, AMP is a crucial part of many Next JS interview questions, so we would advise it to practice well.

  • AMP-First Pages

           These are served to the primary traffic of the website as well as traffic generated from the search engine. We have to use the following syntax to implement AMP-first pages.

  • Hybrid AMP Pages

           Hybrid AMP pages allow users to have a coexist AMP version of a traditional page so that search engines can easily display the AMP version or the page in different mobile search results. To               implement Hybrid AMP to pages, we have to use the following syntax.



AMP-First Pages :-

// pages/index.js

import { withAmp } from 'next/amp'

function HomePage() {

return <p> Welcome to AMP + Next.js.</p>


export default withAmp(HomePage)



Hybrid AMP Pages :-

// pages/index.js

function HomePage() {

return <p> Welcome to AMP + Next.js.</p>


export default withAmp(HomePage, { hybrid: true })

Q13. What is Styled JSX in Next JS?

It’s a CSS-in-JS library used by developers to write scoped and encapsulated CSS to style Next JS components. The styles introduced to one component with Styled JSX will not affect other components, allowing developers to add, delete, and change styles without worrying about any side effects.

Q14. What are the benefits of implementing Serverless mode and how to implement it?

Implementing Serverless mode excellently improves scalability and readability of an application by splitting it into smaller parts known as lambdas. It also promotes affordability with a "pay for what you use" model.

To enable Serverless mode in Next JS, we have to add ‘serverless’ build target in next.config.js.


// next.config.js

module.exports = {

target: 'serverless'


Q15. Does Next JS support static CDN?

Yes, Next JS 5 and above supports static CDN. With the introduction of assetPrefix, Next.JS automatically loads assets from CDN.

Here is a list of advance Next JS interview questions with most appropriate answers suitable best for both freshers as well as experienced developers of this niche to practice.

Latest Version

Latest version of next js is v8.1.1

Reviewed and verified by Umesh Singh
Umesh Singh

My name is Umesh Singh having 11+ experience in Node.JS, React JS, Angular JS, Next JS, PHP, Laravel, WordPress, MySQL, Oracle, JavaScript, HTML and CSS etc. I have worked on around 30+ projects. I lo...