Qualcomm interview questions

3 rounds. Round 1- c based questions Round 2 - microcontroller, os specific questions round 3 - System design related questions. Most revolve around the concept of operating system, memory allocation, memory consumption of various structures. Design questions revolve around common data structures like linked lists, trees, hashtables, arrays etc. Also some puzzles were asked, which revolved around optimization like find solution in minimum number of attempts.

Quite simply the longest interview process I've ever experienced. Started in February with discussions with the hiring manager who I know. Proceeded to interviews with several leaders in Product and Engineering in March. 2 leaders just didn't show up for the calls, which was disrespectful to the candidate. Notified in late April I was short listed, and then didn't hear anything from Qualcomm, even though I sent emails to the hiring manager and recruiter on an average of every 10 days. I've hired these roles before, and would never treat a candidate with such disrespect.