Fizzbuzz? I find the reaction to being asked such an "elementary" question as informative as the approach and solution. And then there are the "programmers" w

Fizzbuzz? I find the reaction to being asked such an "elementary" question as informative as the approach and solution. And then there are the "programmers" who can't write a solution. The rest depends on your niche. For instance, I like asking junior server side web developers to design (but not write all the code for) a URL shortening system. It's simple enough to describe in 10 minutes on a whiteboard but complex enough to spur conversations about decisions and trade-offs.