Webhooks and Retries: Idempotency Scenarios

Webhooks and Retries: Idempotency Scenarios

Answer 15 questions randomly selected from a bank of 30. Choose one best answer per question. Pass with 12 correct answers. Original practice material, not an official certification exam.
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A retry uses the same idempotency key but a different amount. What should an API designed to bind keys to payloads do?