ByteDance interview questions

There are three Interviews in total. There are two interviews with group leads and 1 interview with hr. Each interview is about 40 minutes long. HR interview is a bit shorter.

HR said it was a product operation role but when I went for the interview, it turns out to be a PMO role. The hiring manager was late for the interview. From the start of the interview, the interviewer kept yawning and didn’t bother to cover his mouth. During the interview, the interviewer placed his head down on the table while the interview was on going. The interviewer went on to constantly massage his stiff neck during the meeting and the interviewer made me repeat my answers twice despite being the same. Not sure what is he trying to validate