Validation & Sanitization

Introduction Architecture & Event Loop REPL, CLI & Global Objects Modules (CommonJS & ES Modules) npm, npx & Package Management File System (fs) Path Module OS Module Process Object Buffer Streams Events & EventEmitter Timers HTTP Module URL & Query String DNS, Net & TLS Modules Child Processes Cluster Module Worker Threads Async Programming (Callbacks, Promises, Async/Await) Error Handling Debugging & Logging Express.js Fundamentals Express Routing Express Middleware Request & Response Objects REST API Development Authentication & Authorization (JWT, Sessions, OAuth Basics) Validation & Sanitization File Uploads Template Engines WebSockets & Socket.IO Environment Variables & Configuration Database Integration (MongoDB, MySQL, PostgreSQL Basics) ORM/ODM (Mongoose, Sequelize, Prisma Basics) Testing (Jest, Mocha, Supertest) Performance Optimization Security Best Practices Caching (Redis Basics) Scaling & Deployment Microservices with Node.js Message Queues & Background Jobs Design Patterns