1. What is Node.js? Describe the inner workings of Node.js

Question

Accepted Answer

Node.js is a JavaScript runtime built on Chrome's V8 JavaScript engine, used for server-side and networking applications.

Node.js is an open-source, cross-platform runtime environment for executing JavaScript code outside of a browser.
It uses an event-driven, non-blocking I/O model that makes it lightweight and efficient.
Node.js allows developers to build scalable and high-performance applications.
It provides a rich set of built-in modules and libraries for various functionalities.
Node.js is commonly used for developing web servers, real-time applications, and microservices.
It supports asynchronous programming, allowing multiple requests to be handled concurrently.
Node.js uses the CommonJS module system for organizing and reusing code.
It leverages the V8 JavaScript engine to execute JavaScript code with high performance.
Node.js can be extended with additional modules available through the npm package manager.
It has a vibrant and active community that contributes to its growth and development.

Accepted Answer

Node.js is an open-source, cross-platform JavaScript runtime environment that allows developers to run JavaScript code on the server-side. Node.js was initially built on top of Google's V8 JavaScript engine, which compiles JavaScript code to native machine code, making it very fast.

The inner workings of Node.js can be broken down into the following components:

V8 Engine: Node.js is built on top of Google's V8 JavaScript engine, which compiles JavaScript code to native machine code for optimal performance.
Event Loop: Node.js uses an event-driven, non-blocking I/O model that allows multiple tasks to be performed concurrently. The event loop is responsible for handling I/O operations, timers, and callbacks.
Node.js API: Node.js provides a rich set of built-in modules and libraries that can be used to interact with the file system, network, and other system resources. Some of the core modules include the http module for building web servers, the fs module for file system operations, and the crypto module for cryptographic functions.
Modules: Node.js allows developers to create modular applications using the CommonJS module system. This allows developers to write reusable code and organize their code into smaller, more manageable files.
NPM: Node Package Manager (NPM) is a package manager for Node.js that allows developers to easily install, manage, and share third-party packages and libraries. NPM has a vast collection of open-source packages that can be used to enhance the functionality of Node.js applications.

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