Consider the following function definition and variable declarations: void square(int &n){n= n*n;} int arr[] = {1,...

Consider the following function definition and variable declarations:

void square(int &n){n= n*n;}

int arr[] = {1, 2, 3};

int number = 4;

Which of the following function calls are acceptable? (can have multiple answer)

a.square(1);

b.square(2);

c.square(arr[number]);

d.square(number);

What is the output of the following code segment?

int arr[] = {1, 4, 1, 0};

for (int i=0; i < 4; ++i)

    cout<<arr[i]*2;

a.1014

b.1 4 1 0 (space in between each number)

c.1410

d.0140

e.None of the above

Given array declaration int a[] = {1, 2, 3};, the value of a[3] is

a.1

b.2

c.3

d.Undefined (or out-of-bound error)

e.None of the above