What is the event loop in Node.js?

Can you explain what the event loop is in Node.js?

Sure! The event loop is a core concept in Node.js that allows it to perform non-blocking I/O operations. It enables Node.js to handle multiple operations concurrently without waiting for each one to complete before moving on.

How does the event loop handle asynchronous operations?

The event loop uses a callback queue to manage asynchronous operations. When an async operation completes, its callback is pushed to the queue, and the event loop processes these callbacks one at a time.

What are some common use cases for the event loop?

Common use cases include handling HTTP requests, reading files, and interacting with databases, all of which can be done without blocking the main thread.

Can you give an example of how the event loop works in practice?

Certainly! For example, when you make an HTTP request, Node.js initiates the request and continues executing other code. Once the response is received, the callback associated with that request is added to the queue and executed when the event loop is ready.