Qualcomm Senior Software Engineer interview questions

average interview nothing seems to be difficult and company culture is different as most of them working for 30-40 years. They asked me to some coding solution on their while board.

Had a telephonic round, followed by F2F few days later. The F2F had four rounds each about 1 hour. Good variety of questions asked touching basic C, Linux Kernel and Multimedia. However, after a full day for interviews onsite I would honestly appreciate if the recruiter comes back with a feedback, even if it's negative. I sent four reminders to ask for a feedback desperately. No response !