Your question is Ensuring Consistency Across Services. 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 ensure data consistency across multiple services?
Discuss the design choices you would make for shared data, service-to-service updates, failures, retries, and concurrent writes. Cover both synchronous and asynchronous communication, and explain how you would detect and recover from inconsistency.