DXC Technology Scrum Master interview questions

HR called and scheduled the interview at 12 pm the next day. I reported at 11:45 am and was made to wait until 12:45 pm that included many follow ups from my end with various guys who were supposed to meet me at the waiting room. Finally the interviewer calls at 12:45 and requests if he can go for lunch and come back for interview. Anyway, the interview was kind of immature with no questions on subject and process. Seemed like interviewer did no ground work or prepared for it.