The answer
Certain operations such as file system access and cryptography use libuv's thread pool.
How Does Node.js Handle Asynchronous Operations?
Does Node.js use threads for asynchronous operations?
More FAQs in How Does Node.js Handle Asynchronous Operations?
Node.js uses non-blocking I/O, the Event Loop, libuv, and callback queues to execute asynchronous operations efficiently.
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.
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