Miscellaneous on Data Structures MCQ question and answer with solution

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31.
What is the output of the following code?
#include<stdio.h>
#include<stdlib.h>
struct Node
{
     int val;
     struct Node* next;
}*head;
int max_of_two(int a, int b)
{
      if(a > b)
        return a;
      return b;
}
int recursive_get_max(struct Node* temp)
{
      if(temp->next == 0)
        return  temp->val;
      return max_of_two(temp->val,recursive_get_max(temp->next));
}
int min_of_two(int a, int b)
{
      if(a < b)
        return a;
      return b;
}
int recursive_get_min(struct Node* temp)
{
      if(temp->next == 0)
        return  temp->val;
      return min_of_two(temp->val,recursive_get_min(temp->next));
}
int main()
{
     int n = 9, arr[9] ={1,3,2,4,5,0,5,6,7},i;
     struct Node *temp, *newNode;
     head = (struct Node*)malloc(sizeof(struct Node));
     head -> next =0;
     temp = head;
     for(i=0;i<n;i++)
     {
           newNode =(struct Node*)malloc(sizeof(struct Node));
           newNode->next = 0;
           newNode->val = arr[i];
           temp->next =newNode;
           temp = temp->next;
     }
     int max_num = recursive_get_max(head->next);
     int min_num = recursive_get_min(head->next);
     printf("%d %d",max_num,min_num);
     return 0;
}

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37.
Which of the following is a difference between running key cipher and vigenere cipher?

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38.
Which of the following is a characteristic of random page replacement algorithm?

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