I would assume, like the place I work, hire for the person. If you have a type rating and other rounding out qualities, can you do more then move a gear handle, and your personality is what they want. Then the interview should be a conversation, not an interview. I should be very shortly looking for a new FO, if you have to prepare, then I don't want you. That's not you I am taking to. You should be able to answer simple aviation questions, but I feel since we have a big book of answers, then memorizing it is a waste.