apply through UCSD web, upload your resume and your personal statement. Also your transcript, english test score and answer some questions. Most importantly, make sure let your referrers upload your recommendation letters.
I got interview by one of the professors and he asked about my background and the projects I worked on. Then he asked about some RC circuits. The questions were on the frequency response and step response of the circuits.
Interesting, insightful, positive experience where we talked about numerous different cases and what my interest are. also given time to ask questions which they answer in detail. Would recommend and a postive experience
The interview process was straight forward. I applied through handshake. Since I was a student in UCSD with work experience relevant to their requirement I was considered for in-person interview with professor. There were few technical questions and finally HR round.