You can probably expect to be asked about your previous experience in companies like this, but also more specific questions about when you have used initiative, when you were a leader of a team etc.
They will probably like to hear why you should work for them, how you would deal with customer complaints etc., as well as why you want to work for them. If they ask why you want to work for them, try and sound genuinely interested in the company, rather than answering by telling them you’re a student looking to make extra cash, for example!