GrayMatter Software Services Data Scientist interview questions

I am an engineering student and I had mentioned I know SAS, SQl and little bit of statistics. The interviewer mainly dealt on statistics(annova, logistic regression...etc). The questions were deeply technical. I couldn't answer them. The interviewer was so rude that I couldn't answer them and why did I come for the interview. The other question is do u know R?(when I havent mentioned in my resume, y should they ask me). The interview was so demotivating, he was suggesting me not to go for data analytics and join some other company. I was pissed off and walked out of my interview.