Answer
Workers use cooperative scheduling, requiring manual yielding for fairness. Preemptive scheduling would interrupt tasks at system level, not supported by Node.
Quick Answer
Node.js uses cooperative scheduling — JS code must explicitly yield (await, callback) for other work to run. Worker threads use OS preemptive scheduling — the OS can context-switch threads at any time. In the main thread, long-running JS can starve everything. Worker threads can't starve the main thread, but they compete for CPU via OS scheduling.
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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