heh... I've not used U-SQL yet either, but I thought most of those were not complex data types. only the SQL.% ones were and then it was a guess on 2 out of the 3... I'd at least be half right :). Got it correct then read about it.
With the QOTD's, I tend to look at the question, guess on the answer then read the provided links (even if I was correct). I do the research after answering the question. I think of it kind of like a question on a test; you are given the test and a set of answers and if you looked things up online, you'd fail.
The bad part about my method is that I miss out on a lot of points.
I did like the question though. I've not used U-SQL and I think I should learn it better soon. Just looked it up and found a question on stack overflow about it and I realized I know nothing of U-SQL. Mind you, reading the fourm posts here, I sometimes wonder if I even know T-SQL LOL.