Your question is Ensuring Data Accuracy at Scale. 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).
Tell me about a time you were responsible for managing a large operational dataset and found accuracy or quality issues. How did you make sure the data was reliable, how did you communicate risks or trade-offs, and what was the outcome?