MERN Stack track

MERN Stack interview questions

Full-stack web dev. 10 chapters, 1909+ real interview questions with model answers — learn each concept and practise how to answer it. In English & Hinglish.

189+ topics · Free to start

Why this track works

Learn only what MERN Stack interviews actually ask.

10 chapters, 60–90 minutes each. Every concept starts with a real-world problem — the kind production code throws at you. No wall of theory, no textbook topics the industry never touches. Learn → test yourself → take an AI mock → fix your weak spots.

  • 📖LearnConcept + real-world problem, 60–90 min
  • 🧠RememberModel answers + flashcards
  • 🤖PractiseAI mock + weak-topic report
Full video coursebuilt around a syllabus40h+
Hirenix trackbuilt around interviews~15h

The difference isn’t the content — it’s the filter. Only what’s actually used in production and actually asked in interviews. Textbook topics the industry never touches don’t make the cut.

Start free🌐 English🇮🇳 Hinglish

Certificates

Finish the MERN Stack track. Get certified.

Every MERN Stack chapter you complete earns a certificate with your name on it, issued instantly. Finish all 10 chapters and you earn the MERN Stack Mastery certificate. No exam, no waiting.

  • Chapter certificate

    One for each of the 10 MERN Stack chapters you complete.

  • Stack Mastery certificate

    Complete all 10 chapters for the MERN Stack Mastery certificate.

  • Anyone can verify it

    Each certificate has a QR code and a public link at hirenix.in/verify.

Start learning — freeCertificates are included with Pro.
Sample Hirenix Certificate of Completion with the learner's name and a verification QR code

Verified credential

hirenix.in/verify/…

HTML

Structure

What is HTML? · Text, headings, lists, links · Semantic HTML · Forms and inputs · Links and media

12 topics · 147 questions

View HTML questions

CSS

Style

What is CSS? · Selectors and specificity · Box model · Colors, typography, units · Flexbox

15 topics · 183 questions

View CSS questions

React

Re

What is React? · What is JSX? · Components & Props · State & useState · useEffect & lifecycle

21 topics · 222 questions

View React questions

Redux Toolkit

Rx

What is Redux? · Store, Actions & Reducers · One-way data flow · Why Redux Toolkit? · configureStore + Provider

17 topics · 174 questions

View Redux Toolkit questions

JavaScript

JS

Variables & Scope · Data Types · Type Coercion (== vs ===) · Functions · Hoisting

23 topics · 246 questions

View JavaScript questions

Node.js

Node

What is Node.js? · Node vs Browser · Modules (CommonJS vs ESM) · npm & package.json · Node event loop (libuv)

20 topics · 181 questions

View Node.js questions

Express.js

Express

What is Express? · Express vs raw http · Routing · Middleware (the core) · Request & Response

19 topics · 163 questions

View Express.js questions

MongoDB

Mongo

What is MongoDB? · SQL vs NoSQL · Documents & collections · BSON & data types · Insert (create)

21 topics · 192 questions

View MongoDB questions

SQL

SQL

What is SQL? · Databases & tables · SELECT basics · WHERE & filtering · ORDER BY, LIMIT & DISTINCT

23 topics · 227 questions

View SQL questions

Socket.io & WebSockets

Socket

What is real-time? · HTTP vs WebSocket · WebSocket API basics · What is Socket.io? · Server setup

18 topics · 174 questions

View Socket.io & WebSockets questions