30 JavaScript, React and Node Interview Questions Explained in Plain Language

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A developer on DEV Community has compiled 30 technical interview questions spanning JavaScript, React, and Node.js, framed in conversational language rather than textbook definitions. The guide covers core JS concepts such as closures, hoisting, event loops, and prototype chains, alongside React topics including hooks, virtual DOM diffing, and controlled components. Node.js questions address streams, middleware, clustering, and JWT statelessness. Each answer is written as a spoken explanation, designed to help candidates practice verbalising their understanding rather than reciting memorised definitions. The resource is intended as a self-test tool where readers cover the answer, attempt to explain it aloud, and then compare their response.

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