Node.js Quiz — Event Loop, Async & Runtime Internals
Node.js is the backbone of most JavaScript backends. Truly understanding its single-threaded event loop, the difference between microtasks and macrotasks, and async patterns separates senior backend developers from beginners.
Node.js powers APIs at companies of every scale. Backend and full-stack roles expect deep async knowledge — callbacks, Promises, async/await, and the event loop model.
Sample Questions
3 of 10Q1.What is the order of execution in the Node.js event loop phases?
Q2.What does `process.nextTick()` do compared to `setImmediate()`?
Q3.Why doesn't Node.js block on I/O operations despite being single-threaded?
Answer all 3 questions to see your score
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