This problem was given to me on previous job interview test. It is over now, but I would like to go through my mistakes and hopefully be more prepared next time!

// Identify as many bugs and assumptions as you can in the following code.
// NOTE that there is/are (at least):
// 1 major algorithmic assumption
// 2 portability issues
// 1 syntax error

// Function to copy 'nBytes' of data from src to dst.
void myMemcpy(char* dst, const char* src, int nBytes)

// Try to be fast and copy a word at a time instead of byte by byte

    int* wordDst = (int*)dst;
    int* wordSrc = (int*)src;
    int numWords = nBytes >> 2;
    for (int i=0; i < numWords; i++)
        *wordDst++ = *wordSrc++;

    int numRemaining = nBytes - (numWords << 2);
    dst = (char*)wordDst;
    src = (char*)wordSrc;
    for (int i=0 ; i <= numRemaining; i++);
        *dst++ = *src++;

All I found was a syntax error on line

    for (int i=0 ; i <= numRemaining; i++);

Also the first for loop looks fishy.

Can you guys find any other mistakes?