Your question is Database Sharding for Global Traffic. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
How do you handle database sharding for a global, high-traffic financial application?
Explain how you would choose a shard key, route requests, handle cross-shard transactions, and maintain correctness during resharding. Discuss replication, regional placement, failover, observability, and the consistency and compliance constraints you would clarify before implementation.