Understanding Concurrency, Parallelism and JS

Concurrency and parallelism are often confused, but they have distinct differences. Concurrency involves handling multiple tasks by interleaving, while parallelism means performing them simultaneously. Threads can run concurrently or in parallel, depending on the CPU's number of cores. Node.js, though single-threaded, uses Worker Threads to manage blocking tasks, simplifying concurrency for developers. Understanding how Node.js handles concurrency can help avoid issues like race conditions, making programming more efficient and less error-prone.