I say memorization because they don't allow you to look anything up. I can, for example, look at a problem and remember vaguely that there's an algorithm and/o

I say memorization because they don't allow you to look anything up. I can, for example, look at a problem and remember vaguely that there's an algorithm and/or data structure that's ideal for solving it and some of the high level concepts/keywords I would need to find it. I also know the right google foo to find it again, see if it's still current best practice, find a decent implementation of it, where good documentation is, and so on. I can't always bang it out on a whiteboard from memory though. If I could, I don't think that would somehow make me a better developer. It might make be a better T/A in an academic environment, but that's not typically what these kind of interviews are hiring for.