Your question is Offline Sync for Financial Apps. 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 would you handle offline synchronization for a financial application like Adyen?
Explain how a mobile client would capture changes while offline, synchronize them safely after reconnecting, and handle retries, conflicts, ordering, and partial failures. Because this is a financial application, address idempotency, security, auditability, sensitive data, and the boundary between deterministic synchronization and any ML-assisted prioritization. Discuss how you would evaluate reliability and monitor production behavior.