Never ever take anything as a chance of a job offer until they say we'd like to offer you a job. You never know what is standard business practice for a company. What you went through may be the same process that others went through. Yes it sounds promising, but it doesn't mean you'll get an offer (although it doesn't mean you won't).

I'd imagine you'll be asked some of the same questions you've been already asked, you may be asked situational questions (describe a time you dealt with) or personality/moral questions (You know a co-worker lied about something to their manager, what do you do?) you may also be asked work related questions to find if you can really do the job. While this is just typical stuff that is asked, you can be asked just about anything that's legal, so it's hard to really know. Be comfortable and confiedent and I'm sure you'll rock.