Initial career fair and met with a couple representatives from BHP land group then applied for an interview through my university's career office. The night before the interview they took all the interview candidates to a nice dinner. The first interview was 2:1 and maybe asked one behavioral question, but the rest was relaxed conversation about my previous experience, etc. Six days later I received an invitation to fly to Houston for second round interviews. The interview was 3:1 and was still relaxed, but this time I was asked more behavioral questions. This interview lasted about 45 minutes. A week later I received an offer.