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Basic Questions What is Node.js? Node.js is an open-source, cross-platform runtime environment that allows developers to execute JavaScript code on the server side. It uses the V8 engine developed by Google, which compiles JavaScript to machine code. What is the difference between Node.js and JavaScript? JavaScript is a programming language primarily used for client-side scripting in web browsers. Node.js is a runtime environment that allows JavaScript to be used on the server side, enabling full-stack JavaScript development. What is npm? npm (Node Package Manager) is the default package manager for Node.js. It allows developers to install, share, and manage dependencies in their Node.js applications. Explain the concept of asynchronous programming in Node.js. Asynchronous programming allows Node.js to handle multiple operations concurrently without blocking the execution thread. Callbacks, promises, and async/await are common patterns to manage asynchronous code. What is an event loop...

Introduction to Node.js What is Node.js? Node.js is an open-source, cross-platform runtime environment that allows developers to execute JavaScript code on the server side. Built on Chrome's V8 JavaScript engine, Node.js enables the development of scalable network applications with a focus on performance and efficiency. It allows for the creation of real-time web applications, APIs, and microservices, making it a popular choice for modern web development. History and Evolution Node.js was created by Ryan Dahl in 2009. The initial motivation behind Node.js was to create a platform capable of handling multiple concurrent connections efficiently, especially for I/O-heavy applications. Over the years, Node.js has evolved significantly, driven by contributions from the open-source community and companies like Joyent, which played a pivotal role in its early development. In 2015, Node.js was transitioned to the Node.js Foundation, which later became part of the OpenJS Foundation. This tr...