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Sharding, replication & partitioningMediumSDE-3

Your payments app is expanding to the Middle East and Europe. Indian payment data must stay in India under RBI rules, and EU user data has GDPR requirements. How do you partition data across regions?

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PaytmPhonePeRazorpay

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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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Design a payment gateway for merchants (Razorpay) Lesson: Multi-region and disaster recovery

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