SLB REMS Mechanical Engineering interview questions

I applied online. Got a call from one of the company recruiter and waited 1 month. After that I sent an email to followup. Then she let me know that they are having an interview. I said I am interested. The interview was in Sugarland,TX. On first day, they presented about their company. After that there was a catapult building. We had 6 people, so they splited us into two groups.Next day there was technical presentation on any project we worked on. After the presentation there was 4 interviews. Each interviews were 45 min long. there were two people in each group. One group was very hard in questioning. They