What is Event-driven Programming in Node.js?

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. Node.js uses an event-driven architecture that allows developers to write asynchronous code that responds to these events.

How it differs from conventional request-response programming:

In conventional request-response programming, the flow of the program is typically sequential, where a request is made, and the program waits synchronously for a response before moving on to the next task. This can lead to blocking of the program, especially in I/O operations.

On the other hand, event-driven programming in Node.js allows for non-blocking, asynchronous operations. Instead of waiting for a response, Node.js continues to execute other tasks and triggers a callback when the response is received. This makes Node.js highly efficient for handling multiple requests concurrently.