Vibe codingHardvc-g125

Subject Ai code reviewLevel Senior–Staff~18 minCommon in Algorithms & data structures interviewsIndustries Software development

Question

An AI wrote this data-fetching effect with a config object dependency to 'refetch when options change.' It fires a network request in an infinite loop and pegs the API. Diagnose it.

tsx

1function useData(url: string) {2  const options = { headers: { 'X-Trace': 'on' }, mode: 'cors' };3  const [data, setData] = useState(null);4  useEffect(() => {5    fetch(url, options).then(r => r.json()).then(setData);6  }, [url, options]);7  return data;8}

What a strong answer looks like

Treat the AI’s output as a draft to verify, not an answer to trust. Name the specific flaw and the input that triggers it, say how you’d catch it — tests, edge cases, reading critically — and how you’d re-prompt or decompose to get it right.

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Describe your solution

Vibe coding: describe the solution in plain language (or narrate it) and the coach grades your approach. Generating runnable code from your description is coming next.

Run or narrate your approach, then ask the coach.