United Technologies Electronic Design Engineer interview questions

Applied to the posting through their website and received an email asking for a phone interview 3 days later. Did the phone interview and one week later was offered an on site interview. The on site interview was in Syracuse NY and was fully paid for by the company. Interview was extremely technical and the interviewers showed me electrical schematics and asked what certain components were doing based on the specific setup of the schematic. Interviews lasted all day starting from 8am until 3pm. Day full of interviews with a lunch and work site tour budged into the itenieary. From point of applying to job until on site interview took about a month. 3wks later and I'm still waiting on their decision. Extremely long process.