MERN Stack track

MERN Stack interview questions

Full-stack web dev. 8 chapters, 1000+ real interview questions with model answers — learn each concept and practise how to answer it. In English & Hinglish.

158+ topics · Free to start

React

Re

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

17 topics · 174 questions

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Redux Toolkit

Rx

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

17 topics · 174 questions

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JavaScript

JS

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

23 topics · 246 questions

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Node.js

Node

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

20 topics · 0 questions

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Express.js

Express

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

19 topics · 163 questions

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MongoDB

Mongo

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

21 topics · 69 questions

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SQL

SQL

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

23 topics · 0 questions

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Socket.io & WebSockets

Socket

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

18 topics · 174 questions

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