Your question is Ensure Data Consistency. 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 in a distributed system?
Discuss the consistency model you would choose, how data moves across services and replicas, and how you handle concurrent writes, retries, failures, and delayed events. Address both correctness and availability, including how you would detect and recover from inconsistencies. Relate the design to ML concerns such as online and offline feature parity, reproducible training data, and model-serving behavior.