At my first job interview it was a scenario type thing, there would be a question something along the lines of 'if a customer did this' and then you had to pick one of 4 options. Obviously that wasn't to tricky, they were just testing to see if you picked the diplomatic choices.
At the my second interview, I was asked a question and gave a personal answer. Like others have mentioned it was the basic -
Why do you want to work for us?
Do you know any background information on our company?
When have you offered good/bad customer service?
What do you think you weaknesses would be?
How do you think you would work in a team?
Why did you leave your last job?
What are your aspirations in life?
I felt it helped on the questions which were negative to sort of turn it around for example 'I feel my biggest weakness would have been timekeeping but from xxx and xxx I have learnt that'. I think employers like to think if you felt you were lacking in certain areas you'd do something about it. Also it helps to do some background research on the company your interviewing with, just so if the question does come up you can be informed and seem like you're really interested in the company and working for them. I actually got both the jobs and am still at the second.
Other than that, good luck! No need to stress - I'm sure you will do great.
