tringapps Java Developer interview questions

It is completely waste of time to attendtheir interview.Please dont attend their interview, out of 1000 people they shortlisted 30 people for third round. For same position they will hire many candidates and they will call as they wish,I attended interview, I got selected, I got contacts from other selected candidates also. We four got selected. but they called only one to join. I applied through referal. The process took a week. I wasted one week of my life. They asked about my academic projects and questions related to java, mysql and data structures. second round was Hacker earth code challenge. Third round technical F2F.