Had not heard about this function until now. Like others I assumed they got it right. The question actually pretty much answers itself. The first 3 sets of choices are all pretty much the same thing. If the function got the leap year right or wrong will provide those. The last couple options seemed like a no brainer to me because the implicit date conversion would not be any different in a function than anywhere else and if the conversion had failed none of the rest of the answers would have even been possible. Given that, there were 8 choices and we were told there were 4 possible answers it all came down to a coin-toss...does the function correctly recognize leap years or not.

Good question and it is great to learn about new stuff in 2012!!!