Extron Electronics Designer interview questions

I was lucky to have the face-to-face interview with the HR and project managers right off the bat instead of traveling around. It took me "three hours" in the interview. They seemed to be serious about the process but the project manager could not define his interviewing questions very well. (Maybe they had no idea what qualification they really want) After the interview, I tried to google more about the project manager's background information on Linkedin that night. He seemed to have a lot of related experience. But the next day, I tried to google again. Everything was never found on Linkedin no matter what keywords I used. Then, they lost any contact nearly a month and sent me a super brief email saying they will keep looking for the best suited person.