Altera Design Engineer interview questions

I applied through an employee referral. The manager called me to schedule an onsite interview. I was interviewed by four people one by one. They asked about the projects included in your resume and some related technical questions. It lasted about three hours.

On site, 5 individual interviews. Asked Algorithm, data structure questions. Asked to solve problem on white board. They were very frank, and helpful. Tried to help me when got stuck. One of the interviewer just asked behavioral questions. No technical questions. Enjoyed the whole process. Learnt something new. Was not prepared well. Hence, didnot get the job. Was not very challanging i think.