Hello readers 👋, welcome to the 6th blog of our Node.js journey! In the last post, we explored the crucial difference between blocking and non-blocking code. We saw that a single blocking call can freeze an entire server, while non-blocking code keeps it responsive. Today, we tackle the question that naturally follows: if Node.js runs JavaScript on just one thread, how on earth does it handle thousands of requests at the same time without falling apart? It sounds impossible. A single checkout line in a supermarket can only process one customer at a time. Yet Node.js servers routinely manage tens of thousands of concurrent connections. The answer lies in a brilliant combination of the event loop, non-blocking I/O, and background workers. Let's break it down. The single-threaded nature of Node.js First, let's be clear: Node.js executes your JavaScript code in a single main thread. That means when you write: console . log ( " Step 1 " ); console .…