SLB Software Engineer(Internship) interview questions

a 30-minute phone interview, went through my resume and asked some details, with some simple technical questions including SVM and Naive Bayes. The interviewer was not much patient and I didn't answer well so I failed

Talked to recruiter at campus event. Got a short 30 minute phone interview 2 weeks later. The interview was focused on projects, past work experience and some behavior questions. No coding. Received congratulation email two weeks after phone interview. The clue I'm having is that Schlumberger really cares about if you're from prestigious universities and your GPA.