At one day , a mail came from qualcomm along with the hackerrank test link which was the first round. The hackerrank question comprises of 10 mcqs and 2 coding questions which are of little bit difficulty . After a week i got a call from one HR said that I cleared first round and the process will be continued in Hyderabad office. They also asked for the comfortable dates and one most important thing is they literally care every expenses for your interview process. They booked up and down flights along with cabs from your home to office and also for return. But the interview process is difficult for me. First Round: The interviewer gave me a paper which has one code and asked me to debug this. Memcopy, memmove, structure padding , packing, 2D memory allocation in heap, free in heap, calloc ,realloc, Some DS Questions. Second Round: Completely OS related questions, which is not directly asked . Expected the logical answers. And 2-3 questions on DS Third round: It is simple among the three rounds ,Function call, stack, Return calls, Big Indian & Little Indian, Memory management in C, Bit related questions . I almost answered all the questions but due to the performance in my first 2 rounds i was not selected . One who are Strong in C, Data Structures and Operating Systems can clear the Qualcomm Interview.