Micron Technology Automation Engineer interview questions

Interview was set on Tuesday 8:30am, rescheduled to Thursday 10am. No one admitted me into the call so I called HR but no response. About 15 min later HR join to tell me interviewer is away so give him some time. 15 min later interviewer joined, tested his mic and then told me sorry give him some time. He then left the call and I waited for about 30 min before HR emailed me rescheduling the interview to later 1:30pm that day.