Welcome to your interview.
The question is on your right: Rank Top 3 Per Department. Take a moment with it first.
Talk your thinking through with me if you like - when you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes). Discussion and graded submissions share your five interviewer interactions, so spend them well.
Write a SQL query using window functions to rank transactions within each department by amount and return the top 3 per department.