What is the event loop in Node.js and how does it work?

What is the event loop in Node.js and how does it work?

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.

Can you explain how the event loop handles asynchronous callbacks?

Sure! When an asynchronous operation is initiated, Node.js registers a callback function and continues executing other code. Once the operation completes, the callback is placed in the event loop's queue to be executed when the call stack is empty.

What are some common use cases for the event loop?

Common use cases include handling HTTP requests, reading files, and interacting with databases. The event loop allows these operations to run efficiently without blocking the main thread.

How does the event loop differ from traditional threading models?

Unlike traditional threading models that use multiple threads to handle concurrent operations, the event loop uses a single-threaded model with non-blocking I/O, which reduces overhead and improves performance.