ByteDance Project Management Office (PMO) interview questions

Many of the employee at the company are new, questions a slightly ok, no hard to answer. They are pretty on time, but some questions are somewhat unrelated to work.

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