After passing the phone interview (easy questions with the + and *), i was invited to the on-site interviews. one non tech and two tech. the non tech also had a technical question, not an easy one. two more technical interviews followed. not too difficult questions, yet complicated and if you're off by a bit they will probably not let you pass. i gave good solutions to all questions yet it took me a bit of extra time and some confusion in between, and they did not accept me. I recommend everyone that prepares to just go over all questions, you can be getting the easy ones and fail them because you practiced too hard on the difficult ones. true story.