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Idempotency, retries & failure handlingHardSDE-3
Your cache cluster restarts during peak traffic. The database gets overloaded, and even after the cache is back, the system stays down for an hour. Explain what is happening and how you would recover and prevent it.
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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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