Diagnostics for the Real World interview questions

Had an interview set up pretty quickly after applying, interview was an absolute train wreck. I wasn't prepared for the line of questioning which felt more like an interrogation. I was asked repeatedly about why I didn't study a Master's, was told my answer to a personal question was wrong, and was laughed at after they interrogated me to find out where I was "really" from.

Interview process is usually very involved, with one on one interviews with multiple members of the company. It is also possible, and highly likely that initial interviews will be conducted with multiple interviewers primarily to save time for the interviewers. Technical and manual positions will require hands-on interview where interviewee will be ask to perform certain tasks related to the position in question.