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Idempotency, retries & failure handlingEasySDE-1
Which of these operations are safe to retry: 'set delivery address', 'add Rs 100 to wallet', 'add item to cart', 'cancel order'? How would you make the unsafe ones safe?
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CREDFlipkartPaytmPhonePe
Think first
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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