TATA ELXSI Design Engineer interview questions

I have participated in campus placements in my college. There were two rounds of interview each one about one hour of time. Questions are good and interesting. Overall an average experience

I had an om-campus interview. My first round was aptitude which was for 3 hours, intermediate level questions with conventional pen and paper exam. Second round was face to face technical interview which lasted for 45 min. Third round was HR which was for 10 min