Bosch Robotics Software Engineer interview questions

It is very important to have you refer to this company. If you are not referred, it is almost impossible to get an interview. My first interview was a general interview with not too many specific technical question. The second phone interview was a coding one. Then they asked me for an on site interview which was too long and took about 8 hours. During the on-site interview, I presented my work for the first two hours. Then we went for a lunch. After that there was an HR interview. Then technical interviews started. The first one was about pure programming, and the second one was about roboctis problems.