Top | MCQs on Array Data Strcuture with Answers | Question 20

Consider the below program. What is the expected output? 

C++

void fun(int arr[], int start, int end)
{
    while (start < end) {
        int temp = arr[start];
        arr[start] = arr[end];
        arr[end] = temp;
        start++;
        end--;
    }
}

(A)

swapping the elements pairwise

(B)

sorting the elements

(C)

Reverse an array

(D)

None

Answer: (C)
Explanation:

The above code is for reversing an array of elements., we are just swapping the first and last element of the array, and the whole array is reversed.

For more reference:
https://www.geeksforgeeks.org/write-a-program-to-reverse-an-array-or-string/

Hence Option(C) is correct.

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