Even though i actually got this right the wording of the question aint that good. And that could be part of the reason why the correct/incorrect ration is out off wack (81% wrong at the time).

The heading said "Using IDENTITY as a key column". Key part there being "key". Now combined with the fact that the create table statement was incomplete "-- other columns);". Got me wondering if the author had a missing "primary key (PersonID)" at the end (or something similar). Or that is was implied that there would be code to create a key. Which of course would have inverted the answer.

Though this could be a result from lack of english skills on my part.

Though i must say i liked the question since i got it right 😀