The Tech Interview | SWE prep on Instagram: "A strong answer doesn’t stop at “yes”. JavaScript runs one thing at a time. Only one piece of JavaScript can execute at any given moment. What often confuses people is async code. Async doesn’t change how JavaScript runs. It changes when work is allowed to run. Network requests, timers, and promises don’t execute in parallel with your code. They complete elsewhere, then wait to be scheduled back onto the main thread. That scheduling is handled by the