face to face, asking q instant and knowing about your understanding and background of any process. later you will be intimated over call or mail within few days. thats it according to my case. it may differ case to case. for me it was one level interview thats it

Interviewer seemed arrogant for no reason, he was 10 mins late to the virtual meeting and answered very rudely. He didn't ask anything about the subjects and left the meeting while I was speaking something