I am not going to address specific questions. If one does not have the basic answers...one needs to find an industry where the will be more prepared for questions. In sales there are set question asked of you on a sales call, however there are some questions you might never have been asked. Your initial response base is derived from product/service knowledge...and answer the best you can.
However, a job interview is about 33% selling yourself (personal grooming, clothing, demeanor, on-time, resume' presentation) 33% experience (years, position, skills, etc...)
33%, most importantly, a job interview is not a sales call...it's a date. Generally you have one shot, and cannot go back for a second meeting. Therefore, consider the interview as a date...sounds odd.
I have been married for a long time, and everyone is unique. I cannot suggest how to act on your "job date," just read the signs, and go with your strengths.