Microsoft Intern - Software Engineer interview questions

The interviewer didn't ask about any of my backgrounds and started throwing strange questions, including linear algebra, server-side concepts, front-end design. Very impatient and unfriendly person, seems wanted the interview as soon as possible hence giving me some random questions

Terrible. I felt that the interviewers were uninterested and unhappy - in general! Even as I met them did they seem completely uninterested. It really rubbed me the wrong way. During the coding interviews I saw two of them scrolling through Facebook. It sadly threw me off my game.