[Cushman]

I just went through this exact same process reading your comment. "Well, DSA was a couple years ago... I don't know if I could answer that right off the bat." "Come to think of it, how would I answer that?" "Oh, it's completely obvious."

Not that I expect to be in a position to make hiring decisions, but if someone can't answer that intuitively with a few moments' thought I know they're probably a couple of years' experience from being able to keep up with me.