I totally agree. IMO it doesn't even have to be a CS course; my experience TAing calculus helped immensely with whiteboard interviews. I think it's the process

I totally agree. IMO it doesn't even have to be a CS course; my experience TAing calculus helped immensely with whiteboard interviews. I think it's the process of pacing yourself through the problem. If I see some fancy integral, I might be able to solve it in one or two lines. But if I want the students to understand, I'm not allowed to skip steps so it'll take more like 15 lines, and I'll have to verbally explain each line as I write it. It's getting used to switching back and forth between dictation and logical process.