Quiz · 5 questions
🎼 Async — Callbacks, Promises, and the Modern Toolkit
From error-first callbacks to AsyncLocalStorage, with the event-loop machinery in plain sight
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Quiz
01In 2026 Node, when are error-first callbacks still the RIGHT shape for an API?
02A promise has settled (fulfilled or rejected). What can change about it now?
03Which of these starts the two fetches in PARALLEL?
04Between the sync block ending and the next event loop phase starting, what runs?
05What does
AbortController.abort() actually do?Comments 0
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