C (Programming Language) Choice Questions

Which Code sample will eventually cause the computer to run out of memory?

:

while(1)
{
    char *smallString = (char *) malloc(10);
}

:

long long number = 1;
    while(1)
    number *= 2;

:

while(1)
{
    char hugeString[1000000L];
    memset(hugeString, 0, 1000000L);
}

:

while(1)
{
    long *bigArray = (long *) malloc(sizeof(long) * 1000);
    memset(bigArray, 1000000, 1000);

    (bigArray);
}