Going the opposite way, here's a story of an electrical engineering class I had in college. The class subject was a slightly off-the-main-path course, taught by a visiting professor from overseas. It involved deep analysis of electrical circuits with some heavy math. At the final exam, the first thing I noticed was how thin the exam packet was. It was a harrowing experience when I opened the exam -- it consisted of exactly one question. As it turned out, it required using nearly everything we learned during the course to solve that one question, which I thought was a fascinating if scary way to test students, as forgetting one of the methods taught could block progress.