Answer
libuv manages I/O, timers, and thread pools. V8 executes JS and handles memory. Both coordinate via event loop phases to run async operations.
Quick Answer
libuv is the C library that provides Node.js's event loop, async I/O, thread pool, and timer management. It handles file system, DNS, networking, and child processes asynchronously across all platforms. V8 executes JavaScript. libuv handles everything outside V8. When you await a file read, V8 suspends the coroutine and libuv's thread pool does the actual disk I/O.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ