Data Structures | Linked List | Question 8

The following C function takes a single-linked list of integers as a parameter and rearranges the elements of the list. The function is called with the list containing the integers 1, 2, 3, 4, 5, 6, 7 in the given order. What will be the contents of the list after the function completes execution?

struct node 
  int value;
  struct node *next;
void rearrange(struct node *list)
  struct node *p, * q;
  int temp;
  if ((!list) || !list->next) 
  p = list;
  q = list->next;
     temp = p->value;
     p->value = q->value;
     q->value = temp;
     p = q->next;
     q = p?p->next:0;

(A) 1,2,3,4,5,6,7
(B) 2,1,4,3,6,5,7
(C) 1,3,2,5,4,7,6
(D) 2,3,4,5,6,7,1

Answer: (B)

Explanation: The function rearrange() exchanges data of every node with its next node. It starts exchanging data from the first node itself.

Quiz of this Question

GATE CS Corner    Company Wise Coding Practice

Recommended Posts:

0 Average Difficulty : 0/5.0
No votes yet.