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Idempotency, retries & failure handlingMediumSDE-2
The mobile app gives up on a request after 3 seconds, but your backend keeps working on it for 15 seconds, calling five services. Why is that a problem, and how do you fix it?
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GoogleSwiggyUber
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Answer out loud as you would in the room — clarify, give numbers, name the trade-off — then compare with the model answer.
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