Architecture

Node.js is a JavaScript runtime built on Chrome's V8 JavaScript engine. It is designed with an event-driven, non-blocking I/O model, making it efficient and scalable for building server-side applications. The key architectural components of Node.js include:

Event-Driven Architecture: Node.js uses an event-driven programming model, where the main loop listens for events and triggers corresponding callbacks when events occur.

Asynchronous I/O: Node.js features asynchronous I/O operations, allowing the server to handle multiple concurrent connections without having to wait for each operation to complete.

Single-Threaded Event Loop: Node.js runs on a single thread, using the event loop to handle concurrent requests and offload I/O operations to the operating system.

Modular Design: Node.js has a modular design, with the core functionality provided by the Node.js runtime and additional functionality added through third-party modules and packages.