setTimeout(fn, 0) vs setImmediate(fn) — which runs first?

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CodeZetta · Accepted Answer

It depends on context: inside an I/O callback, setImmediate usually runs first; in main module, ordering can vary. Don't rely on either for precise sequencing — use explicit control flow. This question tests whether candidates know 'it depends' rather than a false absolute.

setTimeout(fn, 0) vs setImmediate(fn) — which runs first?

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Short Interview Answer

Detailed Explanation

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