SIGSEV on strcmp of memset string

Question

In the following program, i am expecting the for loop to stop after 3 elements. But it keeps on going indefinitely and fails later on with a coredump.

1. is mal

Answer 1

for(i=0;strcmp("",str[i])!=0;i++)

You do dereference the unitialized pointer

for(i=0;str[i];i++)

But it will not work as this

memset(str,0,10);

Does not initialize the whole array

memset(str,0,10*sizeof(char *);