Express Interview Questions. Common Express.js questions in backend and Node.js interviews. These range from framework fundamentals to architecture decisions and security - topics that come up in both junior and senior d…
ReadExpress Middleware & Request Pipeline. Middleware functions have access to request, response objects and the next middleware function. They execute in order and can modify req/res or end the request.. Basic Middleware. c…
ReadExpress Routing. const express = require('express'); const app = express(); // Basic routes app.get('/', (req, res) => { res.send('Hello World'); }); app.post('/api/users', (req, res) => { const user = req.body; res.stat…
ReadExpress Middleware. Middleware functions are the backbone of Express. They have access to the request and response objects and the next() function. Middleware can execute code, modify req/res, end the request-response cy…
ReadExpress Routing. Routing determines how an application responds to client requests at specific endpoints. Express provides a full-featured routing system that supports route parameters, query strings, route-level middlew…
ReadExpress Authentication & Security. Security is not optional. Every production Express API needs authentication, input validation, rate limiting, and proper security headers. This page covers the essential patterns and pa…
ReadExpress.js Setup & Basics. Express is a minimal, unopinionated web framework for Node.js. It provides a thin layer of fundamental web application features - routing, middleware, and HTTP utilities - without obscuring the…
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