I had my first screening interview with Illumina recently. It was conducted via a new method of digital video interview and not a phone interview. This was my first time with such method where questions are displayed via a software on screen and no real person talks to you. So practicing few times infront of webcam before the interview helped me. You get a set of Practice questions too. I got 1.5 minutes to prepare and 3-4 minutes to answer the question. 8 questions total and interview lasted for about 30 minutes.