Honestly drop the question/answer aspect for technical checkouts. Offer a problem then work with them to solve it. The most important aspects are two fold, What questions do they ask, and now that you are being cooperative and a team mate, how do they interact with you.

EDIT: But during the entire process keep in mind they are hopefully interviewing your company. Far too many companies forget this aspect and the entire process has become lopsided in favor of companies making candidates jump through hoops.