Qualcomm ASIC Design Engineer interview questions

I applied through university career fair, there they asked me to explain one of the projects I had done and how I rate my verilog. Then after 3 weeks they emailed me to set phone interview. On the phone interview they explained what roles are they looking for and a little about my background and then series of technical questions about clock domain crossing, setup and hold time, clock skew

Phone Interview directly got a call on 3 rd day without any schedule of phn interview. very surprised by the timing as well around 4.30 PM. interview lasted for over 30 min. not sure where it went wrong. received response the next day.