Your question is Why is Node.js Single-Threaded. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Node.js – Why is it single-threaded? (follow-ups on event loop, microtask queue, process.nextTick, CPU-intensive work)
Asked in the Technical Interview stage. Reported follow-ups: How does the event loop work? What happens with Promises?
Design a backend observability feature for Accenture Engineering Cloud that helps teams diagnose Node.js latency spikes in production. Focus on how the system would identify event-loop stalls, microtask starvation, and CPU-intensive work, and how it would surface actionable explanations to engineers.