What is the output of this code???

Question

Why this code generate the following output
...Code is...
int a[100];
int main ()
{
cout <<a [99];
}
...Options...
1
0
Unpredicted
Error
...Output...
0

Answer 1

It will be 0 because the variable has global scope. Only for objects with automatic storage duration / local scope the value would be indeterminate.
int global_arr[100]; // uninitialized, will be 100 x 0
int main() {
int local_arr[100]; // uninitialized, will be 100 x indeterminate
return 0;
}

Answer 2

Because of array is not initialized, it will return some random value from memory. So, unpredicted is the right response

Answer 3

Depending if memory was cleared or not by other previous program it could be zero or other value

Answer 4

since its not initialized, the content of a mostly filled with garbage value. it could be 0 or any other number

Answer 5

Javier Felipe Toribio but the output is 0 why?