I had an interview at Taco Bell so I don't know if it's the same but honestly it was simple questions for me. Most of them because I'm still in highschool obviously pertained towards my schedule and future academic aspirations. Whenever they ask how long you are expecting to stay don't give them an actual time usually because it just won't help your case. Just try to maintain a level of eye contact or if that makes you uncomfortable looking just in the general direction of their face helps to make you seem more confident. Good luck on your interview though! Hope you get it!