• What is Node.js and its advantages.
• Understanding the event-driven, non-blocking I/O model.
• Setting up the development environment (Node.js installation, REPL).

• Working with built-in modules like fs (File System), http, url, path, and events.
• Understanding and utilizing the EventEmitter for handling custom events.

• Introduction to NPM for managing project dependencies.
• Installing, updating, and publishing packages.
• Understanding package.json and semantic versioning.

• Mastering asynchronous patterns: callbacks, Promises, and async/await.
• Handling errors in asynchronous code.

• Introduction to Express.js, a popular Node.js web framework.
• Creating routes and handling HTTP requests (GET, POST, PUT, DELETE).
• Working with middleware for request processing, authentication, and error handling.
• Building RESTful APIs.

• Connecting Node.js applications to various databases (e.g., MongoDB, MySQL, PostgreSQL).
• Performing CRUD (Create, Read, Update, Delete) operations.
• Using ORMs/ODMs for database interaction (e.g., Mongoose for MongoDB).

• Implementing user authentication (e.g., JWT, sessions, cookies).
• Authorization techniques to control access to resources.

Building real-time features like chat applications using WebSockets and libraries like Socket.io.

Writing unit tests and integration tests using frameworks like Jest and Supertest.

• Deploying Node.js applications to cloud platforms (e.g., AWS, Heroku, DigitalOcean).
• Containerization with Docker.
• Performance optimization and scalability techniques (e.g., clustering, load balancing).