I have been talking with these people for a while, even before graduating. Once I am graduating, they were fast to follow up (in fact, they are the fastest to do so). However they were not pushy or anything, which cannot be said about all the employers/HR out there.
The exact interview is quite fun, with interview questions being interleaved with chats about your work, their work and their short-term to mid-term focus. This gives you an idea of what you will get to work on and helps to have an informed decision. Again, many companies from my experience does not provide such information which makes a decision hard.
As for interview questions, expect some of the typical coding questions with some system design questions. The latter is probably due to my area of expertise. Be prepared. There is really nothing special about coding questions. Study for it.