I submitted my resume online and after one week received a phone interview that lasted about an hour. Most of the phone interview questions were related to basic signal processing, such as how to detect voice pitch, how to perform adaptive noise reduction, and filter designs.

After two weeks, I received an invitation for an on-site interview in San Diego. I met a total of 7 people, including the recruiter, at first. Each interview lasted one hour. The rest of the interviewers were engineers, including the manager of the group. Basic signal processing questions were asked, and I felt I performed well. One of them asked some coding problems and requested that I write the code on a blackboard. The problems were very basic, such as reversing a linked list and matrix operations. However, I believe I did not perform well on the coding questions, which was probably the main reason for the rejection.

All are basic signal processing questions; no surprisingly unexpected ones.