I humbly confess my mistake there. (not my laziness though).
As a matter of fact i thought it was going well with the topic ("translation" of natural language in requests language SQL)... but i must say i can't understand the logic (in "common" meaning) of the (horrible) mistakes i've read. so i guess you're right on that point barta.
Hmm it was only 5/20 points for the exam and was supposed to help the students (er... no!... well not there at least). Can't say i've ever been a fan of MCQ (?QCM) so it won't be too hard for me to give them up.