What is the purpose of the swap function in this program?*1 pointA. To swap the positions of two adjacent elements in the array.B. To swap the values of two variables in the main function.C. To swap the elements at the beginning and end of the array.D. To swap the positions of every two elements in the array.After the fourth pass, what is the array state?*1 pointA. {1, 2, 4, 3, 5, 6, 7, 8, 9, 10}B. {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}C. {2, 1, 4, 5, 7, 3, 8, 6, 9, 10}D. {10, 9, 8, 7, 6, 5, 4, 3, 2, 1}

What is swap space? Explain.

What is the output of this C++ code? #include <iostream>using namespace std;void swap(int a,int b){    int temp = a;    a=b;    b=temp;}int main(){    int a = 1, b = 2;    swap(a,b);    cout<<a<<" "<<b;    return 0;} 1 22 21 12 1

Suppose an array a contains 3 9 6 12. Walk through the following code that swaps two elements in the array.123456789int i = 1;int j = 2;// Good swapdouble temp = a[i];a[i] = a[j];a[j] = temp;// Bad swapa[i] = a[j];a[j] = a[i];Track variables in a trace table. On a sheet of paper, make the table below (the first row is filled in with initial values).i j a[0] a[1] a[2] a[3] temp1 2 3 9 6 12 1)What is the value of temp after line 4 executes?CheckShow answer2)What is the value of a[1] after line 5 executes?CheckShow answer3)What is the value of a[2] after line 6 executes?CheckShow answer4)What is the value of a[1] after line 8 executes?CheckShow answer5)What is the value of a[2] after line 9 executes?CheckShow answer

Give the values that are changed after the call to the swap function if the parameter passingmechanism used is call-by-reference.swap ( i , a [ i ] )Assume the initial value of i. Make any other necessary assumptions. Justify your answerby showing the values at each step of the swap function.

Given datatype of two variable as an integer value and address of two variables as a void pointer to the function common_swap(). Do swap the values pointed by the two pointer variables.  The integer value from 1 to 6 means the datatype. 1. char(%c) 2. short int(%hd) 3.long int(%ld) 4. long long int(%lld) 5. float(%f) 6. double(%lf).