Roche Front End Engineer interview questions

I was invited for an onsite interview through a headhunter and there was no first, telephone interview previously. There were 4 interviewers and all was very nice and friendly. They explained me first what will be the project that i will work on and then they started to ask questions about my last position and the work conditions there. After that they gave some screenshots of an application and they asked how would i started to build such an app. I didn't got the job but i have a very positive impression for the company and the people working there.