Your question is Consistency Across Service Pipelines. 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).
You're working on pipelines that ingest and reconcile data produced by multiple microservices. Each service publishes updates independently, and downstream consumers need a consistent view even when messages arrive late, out of order, or more than once.
How do you ensure data consistency across multiple microservices?