Sample Question #284 (programming case question)
You’re working with a large set of data purchased from an outside vendor. You need to write a program to check and clean the data. (For example, the data could be daily quotes for all the stocks in the world.)
- How do you check the data for errors? In other words, how do you check whether a price is "bad"?
- How do you clean the data of such errors? (Do you delete the "bad" prices, or do you do something else?)
[Lest you think I pulled this case question out of my lazy ass, let me assure you that this is a real-life interview question — and not an unpopular one]