Sample Question #182 (applied math)
I see you have an engineering degree. Let me ask you: what’s the fast Fourier transform? How does it work? What are some of its applications?
(Comment: It shocked me that a lot of engineering graduates, including Ph.D.’s, are unfamiliar with the FFT – I thought it was something most engineering subjects would teach their students. I first came into contact with it in some undergrad engineering class at Harvard.)