Mock interview — Mid-level (Node.js + Express)

A mock interview focused on a mid-level backend profile with Node.js and Express. Here definitions are no longer enough: you're evaluated on whether you understand how Node works under the hood and whether you can make decisions. Do it out loud, with a timer (about 40 minutes). Answer on your own first, before reading the suggested answer.

Tip: at this level it's valued that you connect the concepts with their practical consequences (performance, maintainability, production errors), not just the theory.

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