2: Since the cpu access the memory in word size, for a large buffer, (say size N bytes where N > wordsize) isn't it sufficient for buffer to be properly aligned if its address % WORD_SIZE == 0? rather than address % N == 0  check??
Since cpu, anyways will not access more than word size at a time so any address which is divisible by wordsize is by default properly aligned from the cpu access point of view?