Recruited from a campus event. Called a few weeks later and had a phone interview. It went for about 45 minutes. The interviewer was very nice and helpful. Most of the questions were technical but also some questions about the cv (20%).

Submit the resume online. Talked to HR first on the phone, then scheduled a video conference with hiring manager. The interviewer was late for 10 minutes. Apparently, he was not prepared and simply asked me to introduce my previous projects one by one. After I finished one, there is no further question but just turn to next one. Finally, give me a probability question to solve. I provided the solution but the interviewer only responded "yes" then left. I don't even have a chance to ask some questions. Totally wasted my time.