Apple Interview Question

Phone Interview: - transform 16 bit rgb to 24 bit rgb Take Home Problem: - implement a thread pool Onsite: - transfer data between reader and writer thread using mutex and atomics for synchronization - filter sensor data to remove random noise - reverse a byte - implement software based list of timers using a single hardware timer - compute change in quarters, dimes, nickels, and pennies for a cents value - implement memmove - rotate a matrix 90 degrees - implement a dma driver