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Support reports duplicate charges. The API logs show two POST /api/orders with different idempotency keys 1.2s apart.
Your task: write a SQL query to find likely duplicate orders from the last 24 hours. What columns would you group by, and what false positives would you expect?
Write your own answer first — the defect report, the case table, the locator, whatever the question asks for. An interviewer grades your reasoning, not your recall.
Practice this live with an AI interviewer
Starts a QA mock interview pre-filled with this problem — you can edit the brief before starting.