In my onsite interview, the first three interviewers are very nice, when come to the fourth people, I was told he/she was a director and the last interview was the most important one. However finally I was told that the director scheduled before was not available and some people else would instead him. When the forth people came, she just brought a phone and a charger, without pen, paper. She asked me to give her my resume and asked me who do I known in her company. Then gave me two brain teasers then continued to using phone.....

1 or 2 phone screens with hiring managers (or team member) and 1 onsite meeting with many interviewers. The phone screen interview is about 30 mins. The onsite is 30 mins per interviewer.