Job Interview Questions: What to expect for a job interview at a hospital?

I'm a 16 year old guy whose first job interview is tomorrow. I'm applying for a job as a Food Service Aid, but I'm not totally sure what the whole deal is with these interviews.
What do they ask? How long is it? Talk about Payments?

Can someone just tell me everything to expect.

Job Interview - How Your Body Language Can Affect Your Interview

Recommended Answer:
What ever you do dont ask about pay. It looks really bad and is kind of rude. Make sure to know how much you can expect to get paid before you go in their. Usally they'll like to keep it short but make sure they know what they are buying tends to be longer if its going good, so 15-25 min bad 25-35min is good. They ask pretty general questions so know use worrying about revising just go in their and tell the truth.

P.S dont forget to make a good first impression.

Four Job Interview Tips - Prepare to Excel