The answer
Node.js uses non-blocking I/O, the Event Loop, libuv, and callback queues to execute asynchronous operations efficiently.
How Does Node.js Handle Asynchronous Operations?
How does Node.js handle asynchronous operations?
More FAQs in How Does Node.js Handle Asynchronous Operations?
libuv manages the Event Loop, thread pool, asynchronous I/O operations, and many low-level runtime features.
No. Node.js delegates the operation and continues executing other code while waiting for completion.
Certain operations such as file system access and cryptography use libuv's thread pool.
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