Qualcomm Software Engineer interview questions

Pointers in c++ – Focus on precedence and associativity of operators(60%) Union and structure in c++ worst fit, best fit which one is better? pseudo code for queue using two stacks NOP operation – takes memory stalls in code segment? sorting algorithms complexity? bitwise operator questions in c++ super keyword in java points in mcq forms static keyword in c++ const pointers in c LRU AND FCFS page faults algorithms numericals in os heapify, heap sort complexity?

They asked many concepts from OS, like mutex, semaphores, scheduling etc.