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Observability & operationsHardSDE-3
A user request goes through API gateway, auth, cart, pricing and inventory services, each with a 99.9% SLO. Product wants 99.9% for the whole checkout journey. Is that possible, and how would you design SLOs across the chain?
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AmazonFlipkartWalmart Global Tech
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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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