Fiserv Sr. accountant interview questions

I interviewed with a manager and director. The process was very structured and organized. The conversation was fluid, and went longer than the hour scheduled. They asked lots of example based questions.

1)I got a call from HR and he sechduled my interview with one of accounts senior manager.the interview went well & they said you will get a call from Hr.. 2)within a 2 weeks I got a call from HR for 2nd round of interview. As usual HR sechduled my interview. 3) I was very confident about myself. I met the interviewer (US team supervisor). initially it was good, He started asking questions about my overall experience. However, within sometime he just started talking very rudely and agressively. It seems he had a fight with someone. The way he was talking I just felt insulting. In my 10 years of career I never face such interview. The person has no manners to how to even talk to another person. I don't know what kind of attitude he had. After interview, he just came out of room and shut the door loudly. I was so scared and agry too. I can say it was lifetime bad experience for me. I never intended to write review, however recently I got to know that the same incidence happened with 2 to 3 of my friends and friends collegues.