Can Node.js replace Python or Java?
For many web backends and APIs, yes. For ML, data science, and heavy computation, Python is better. For large enterprise systems with strong typing, Java is better. Node.js is one strong tool, not the only one.
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More FAQs in What Is Node.js Explained: A Beginner's Guide to Backend JavaScript
Node.js is a JavaScript runtime that lets you run JavaScript outside the browser, on the server. Before Node.js, JavaScript only ran in browsers. It is built on Chrome's V8 engine and uses libuv for async I/O.
Neither. Node.js is a runtime, an environment that runs JavaScript. Express is a framework. JavaScript is the language. Node.js is the runtime that lets JavaScript run on the server.
Same language on frontend and backend, huge npm ecosystem, excellent for real-time apps and APIs, and strong community support. These made Node.js dominant for modern web backends.
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