It's not a good idea in an interview to antagonize your victims like this. The goal is to find out what they know, not be a forum for you to show off what you know. This is a very common mistake by interviewers.
I was saying it as the one being interviewed. I conduct interviews differently, in particular never give small problems, and mostly i just drill down various items on their resume (sometimes in the areas lesser known to me, so i'd learn something from the interview :) in the direction what they did, how, what alternatives were considered and why that specific design/approach was chosen over the alternatives, etc...
Sounds like the parent comment was the interviewee, not interviewer.