Oracle Developer interview questions

The recruiter contacted me about 2 weeks after I submitted application online(sent resume to an email address for internship). The recruiter asked for my updated resume and transcripts and then arranged a 5-minute phone chat with me. The phone chat is mainly about the overview of the internship and the interview process. And there is only one round phone interview for internship in Oracle. After a week, I was told to have an interview with a group and followed by another group one more week later. And got rejected an week after the second interview. One interviewer is not patient at all and not nice as what other people said. Another is almost no emotional(I can not feel whether he is happy or not about the answer)