UT Dallas Graduate Research Assistant interview questions

One technical which has web programming languages and database design questions and one face to face behavioral interview and i got mail after 2 days saying that i was selected

I initially contacted one of the mechanical engineering department heads asking about current research projects that have openings for graduate students. It took about a week to get a response, in which he listed a few projects and their respective principle investigators but he mainly directed me to their online site that had a listing and description of the various projects in the department. After reading many of the projects and looking up CV's and backgrounds for the professors, I simply shot an email off to one of the more interesting projects PI. He got back to me the same day asking for me resume, and telling me he was excited about my interest and so on. Later that week he invited me to his lab office, and gave me the information I needed to get through security. He didn't give any details on what the interview was going to be over. When I arrived for the interview I went to his office he sat down with me and we talked about his research, and he ask questions about why I was interested in it, what skills I could bring as a researched, and what I wanted to take away from graduate school. Towards the end of the interview we just began to chat casually, he asked questions about what classes I was going to take, what I wanted to do after I was done with school, If i had seen the new marvel movie, etc. The whole proccess took less than an hour. And by the end he offered me the position, however he told me to not answer for a week becuase he was going to send me some papers relevant (his grant proposal and supporting papers) to the research that he wanted me to read. He said that he wanted to make sure I after reading them I was still interested in the project and the work we were going to be doing. I accepted a week later and It has been an amazing job to date.