In preparation for an interview, come ready to discuss your portfolio at length as well as your design process and what design software you are familiar with. Graphic design positions can be very specific to the company so make sure you brush up on the company's current design style and are ready to explain how your style and experience will mesh.
The questions weren't difficult to answer at all. Normal interview questions. The problem was really that the job they described (Graphic Designer) was not the job they hired me for. They then held it against me when I said that I didn't know how to do the job they wanted me to do (Account Management).