you are gonna get interviewed with abut 4-5 different ppl. One will ask you like stupid trick questions. Just try the best you can there. ANother will be an informal conversation over lunch. One will ask about technical questions...should be normal algorithmic questions. Brush up some from your Algorithms class if you can... like problesm relating to trees, etc. one will talk to u in general, and ur background, etc.
usually a loongg day, but if ur a CS major and doing good in it, B+ or A-....shouldnt be too bad, overall.