Asynchronous programming: Node js involves working asynchronously, or you might also see it as adopting an event-driven programming model for completing numerous tasks concurrently without blocking the main thread. So performance increases and scalability improves. Event-driven I/O: Node js is based on that concept-the event-driven I/O model. In it, when I/O is done, callbacks are in... https://blogs.sparkifysolutions.com/introduction-of-node-js/