No difficult questions mostly about past experiences and content of the resume. Once they are satisfied with your answers HR will move quickly with the interview process. In general I felt the both interviewers are not very experienced as the the interview was without structure and their technical level was mediocre. One of the groups hiring managers had very hard to understand English (heavy Chinese accent) and I had to ask him to repeat all questions. Salary wise do not expect a high salary, however, since it is the Irvine CA region it could be that what they offer is what the market pays there. Salary for similar position in the SF Bay area is about 35K more annually.