What is event-driven programming in Node.js and how does it work?

Event-driven programming in Node.js is a programming paradigm where the flow of the program is determined by events such as user actions, system events, or messages from other programs. In Node.js, this is achieved through the use of event emitters and event listeners.

When an event occurs, such as a user clicking a button or a file being read, an event emitter in Node.js will emit that event. Event listeners are then used to listen for specific events and execute the appropriate callback functions when those events occur.

Event-driven programming in Node.js allows for non-blocking and asynchronous operations, making it suitable for handling large volumes of requests and real-time applications. By using event emitters and listeners, developers can create responsive and scalable applications in Node.js.