Aviovision interview questions

There was 3 round 1 HR 1 Technical discussion, questions and a presentation of a home work in the office. The HW was not difficult at all. During the presentation, they were more interested how I did something and why. Also asked about different scenarios in general, challenged me what would I do to solve this or that etc. I think should have been done in the second interview before I travel there and working on the HW for days.