He wasn't talking to software engineers who may have been out of school for a while had time to forget this stuff though; looks like he was talking to a mix of

He wasn't talking to software engineers who may have been out of school for a while had time to forget this stuff though; looks like he was talking to a mix of graduate and undergraduate students and some faculty, and I would think stuff like this would be covered during freshman/junior year for sure? TBH I personally don't always raise hands to such questions though.