int main(int argc,char *argv[]) why  size of string which each pointer in argv[] array point is of 4 bytes irrespective of sizeof string??

int num = 10; ptr  = malloc(sizeof(int)* number); if memory is allocated like this then the any input statement(scanf,gets,fgets) is not running , compiler jumps these stmts whyyy??

NODE *start : pointer pointing to starting of link list. after free(start) how compiler is accessing whole link list??