My char pointer points to invalid value after being cast from int*

Question

I am learning C programming language, I have just started learning arrays with pointers. I have problem in this question, I hope the that output must be

Answer 1

int main(){
 int arr[] = {1,2,3,4,5};
 char *ptr = (char *) arr;
 printf("%d",*(ptr+4));
 return 0;
}

Each case of arr has sizeof(int) size (which may be 4 on your implementation).

Since ptr is a pointer to char, pointer arithmetic makes ptr + 4 points 4 bytes after &arr[0], which may be &arr[1].

In memory, it looks like something like:

Address | 0 1 2 3 | 4 5 6 7 | ...
Value   |  arr[0] |  arr[1] | ...