TuSimple Sensor Engineer interview questions

I applied for the position through the company's website. There were two rounds of interviews and both of them are technical questions. I was reached by HR and scheduled a one-hour interview with a team. Then, I waited about four weeks to have the second interview. The interviewers are professional and friendly. They will help you out if you cannot answer their questions.

The interviewer was extremely unprofessional and rude. Late for five minutes for the interview and didn't apologize or find an excuse for that. Didn't say a word about the position and company. The entire interview went like he didn't know he had an interview scheduled with me. There was one subject field of the sensor development process I didn't know quite well and then the interviewer told me it's completely unnecessary to continue the interview process. I understand they get a lot of their engineers from outside the U.S. but TuSimple really should give their interviewers a fundamental training session on how to ask interview questions and respond like an industry professional.