phone interview followed by on-site technical interview.

The first interview was over the phone. I got a call after about 2weeks when I submitted the application. We discussed general items from my resume. A few days later, I received a call to set up a face-to-face interview for the following week. The interview lasted for about 4 hours, and I had an interview with 4different people separately. They all asked general questions from my resume, and asked about complex board design, smps design questions