I will offer here two bioinformatics programming problems which I think are interesting, useful and should be approachable by an advanced undergraduate. For a variety of reasons I've been thinking a lot of about skill levels and how to assess them. One key reason is we have two open slots in our group, so I'm plowing through CVs and engaging in the usual hiring funnel struggle -- how do you winnow CVs to phone screens and then down to interviews? We also thought we might, but now won't, bring on a one year intern. But I'm also trying to take a look at my own skill set with a critical eye. Plus I maintain a Quora addiction, and you see there people looking for ways to prove their computational biology chops.