A question and answer system is a great way to find out about potential matches. In such a system (as seen on OK Cupid), you can browse through thousands of questions with multi-choice answers… answer the ones that you want to and also select what answers you would accept from potential matches.
The app uses this information to create a match compatibility score based on the questions that you and your potential match have answered, how they were answered and what you specify are the answers you will accept. Because you can also view the answers they have given you are able to quickly determine whether or not you think there is potential with each user. A truly wonderful feature that we wish was available on more apps.