The most useful "question" is any generic task.
It can be as simple as
-- please put this spreadsheet in alphabetical order
-- I have misplaced your resume, could you send me another copy?
-- That sounds like an interesting article, would you send me a copy later on
Even the most trivial task will really illuminate the difference between candidates. Compared to a task, merely talking is entirely useless. Some very polished candidates will simply ignore the request and do nothing. Some will do one of two or three. Some very quiet candidates who are not "impressive" will do all the requests, thoroughly and with obvious care.
How can someone handle the request to forward an article with care? You have to see it to understand. They may remind you of the context, say a word about the article, and add another one for more context for example.