I first recieved a phone call in which they interviewed me for about 10 mins asking me brief questions and was invited for a face to face interview the following day. I went , it was about an hour long , they asked questions to get to know you in a general and semi personal level. Had math questions to answer in which you are timed. Addition , subraction and multiplication. Another person also interviewed me briefly. I will be going back for another 2 day interview proccess.