Problem
Write an SQL query using window functions to calculate a 7-day rolling average of transactions per customer.
Practicing as: Data Scientist interview at HDFC BankHi, I'll play your HDFC Bank interviewer for the Data Scientist role. Candidates describe these interviews as mostly positive and moderately difficult, so expect me to be friendly and conversational. Take your time with the question above and answer like we're in the room.
You are practicing as a guest. Sign up free to get your answer graded with AI feedback. Your draft stays right here.
