Node.js · Event Loop · Senior · Architecture
Lead: how do you teach teams to reason about event-loop safety?
Short Interview Answer
Ban sync fs in request paths, lint for known blockers, SLOs on event-loop delay, and design reviews for CPU-heavy features.
Detailed Explanation
Provide worker patterns and circuit breakers. Make 'don't block the loop' a shared language in postmortems. Automate detection in staging load tests.