[WrtCdEvrydy]

To be honest, I didn't know that one... I just did basic double division the first time I saw it (into a float and compared it against an int casted back to a float). Someone in the interview room asked my if I remembered modulo and I was like 'oh yea, it gives you the remainder'

[khrbrt]

That's honestly more impressive for creativity sake!

FizzBuzz is just an example of the general problem of "given a set of things, do something to a subset of those things" which comes up often in real world settings. If you knew enough to set up a loop and apply some conditional inside of it, then you passed better than some of the programmers I've worked with.

[karatestomp]

That operator's one I've used more on puzzles than in real life, where I've used it few enough times in 15ish years that I could count them on one hand. I think it only sticks in my mind because, for whatever reason, it was taught early and with some emphasis in a Perl book I read when I was starting out. If not for that I could well fail to come up with a reasonably "correct" solution to FizzBuzz.