In my experience, any whiteboard test of generic algorithms is more of a window into how the lead developer thinks about the people he manages, than an actual t

In my experience, any whiteboard test of generic algorithms is more of a window into how the lead developer thinks about the people he manages, than an actual test of programming ability. It almost always denotes a fixed, "I know best" mindset. It's usually a interview killer for me. And it's just a poor way to assess skill. Learn about modulus once and you'll pass every other wizbang somebody else thinks they're the first to give you. You'll always learn more about a candidate's ability by just having a conversation about programming with them. Anyone worth their salt will not only be able to colloquially talk about their skillset, they'll enjoy it.