WNS

My sister had a interview this two young naaiers that intimidated her during the interview, laughing at the answers she gave to the questions they asked, they asked her who referred her and she mentioned the person, and this pupil happened to be in the team of one of the guys that interviewed my sister, and said ' I must ask her why she decides to refer someone like you' ***!!!! Firstly, why are the interviews not conducted with the respective line managers and HR, since when does team leaders ****en conduct an Interview??? They will be hearing from me!!!