Let us begin by defining a thread. Wikipedia states that - In computer science, a thread of execution is the smallest sequence of programmed instructions that can be managed independently by a scheduler, which is typically a part of the operating system. The implementation of threads and processes differs between operating systems, but in most cases a thread is a component of a process. I n Node.js, there are two types of threads: one Event Loop, also known as the main thread, and a pool of k Workers in a Worker Pool, also known as a thread pool. The libuv library maintains a pool of threads that Node.js uses in the background to perform long-running operations without blocking its main thread. To handle "expensive" tasks, Node.js employs the Worker Pool. This includes I/O for which an operating system does not provide a non-blocking version, as well as CPU-intensive tasks in particular. So, in essence, the threads are executed by the processor. Let's say a system or m...