"Business intelligence analysts use their analysis of market trends and internal data to recommend where a business can improve profits and reduce expenses. Prepare for your interview by brushing up on your financial math and SQL skills, as well as your knowledge of the company's competitive space. A few years of experience and a degree in business, finance, or computer science is required for this position."
What is the market for tennis balls in your city?
It was a market sizing question - the kind you find in books like Case in Point - which I didn't know then. The interviewer just wanted to see how I think, but practicing such questions might have helped.