Job Interview before Getting Certified

Hi, I am interested in becoming a personal trainer and had an interview today at Bally's they are having me come back for a 2nd interview in just 2 days and I have to do a personal training session with one of their men personal trainers, I am not certifed yet nor have I even studied so for me to try and come up with a good session I really don't know where to begin. Please help with how I should start the session from beginning to end.

They also want me to take a 100 question test. If anyone has a link to study for Bally's personal training test, I am not certified yet so unsure what to expect.

thanks for your quick response,

Angie