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MCQ
1.
Linked list is considered as an example of ___________ type of memory allocation.
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MCQ
2.
Generally collection of Nodes is called as __________.
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MCQ
3.
Choose the code snippet which inserts a node to the head of the list?

a)

public void insertHead(int data)
{
 Node temp = new Node(data);
 Node cur = head;
 while(cur.getNext() != head)
  cur = cur.getNext()
 if(head == null)
 {
  head = temp;
  head.setNext(head);
 }
 else
 {
  temp.setNext(head);
  head = temp;
  cur.setNext(temp);
 }
 size++;
}

b)

public void insertHead(int data)
{
 Node temp = new Node(data);
 while(cur != head)
  cur = cur.getNext()
 if(head == null)
 {
  head = temp;
  head.setNext(head);
 }
 else
 {
  temp.setNext(head.getNext());
  cur.setNext(temp);
 }
 size++;
}

c)

public void insertHead(int data)
{
 Node temp = new Node(data);
 if(head == null)
 {
  head = temp;
  head.setNext(head);
 }
 else
 {
  temp.setNext(head.getNext());
  head = temp;
 }
 size++;
}

d)

public void insertHead(int data)
{
 Node temp = new Node(data);
 if(head == null)
 {
  head = temp;
  head.setNext(head.getNext());
 }
 else
 {
  temp.setNext(head.getNext());
  head = temp;
 }
 size++;
}
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MCQ
4.
What is a memory efficient double linked list?
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MCQ
5.
The following function reverse() is supposed to reverse a singly linked list. There is one line missing at the end of the function.

/* Link list node */
struct node
{
    int data;
    struct node* next;
};
 
/* head_ref is a double pointer which points to head (or start) pointer 
  of linked list */
static void reverse(struct node** head_ref)
{
    struct node* prev   = NULL;
    struct node* current = *head_ref;
    struct node* next;
    while (current != NULL)
    {
        next  = current->next;  
        current->next = prev;   
        prev = current;
        current = next;
    }
    /*ADD A STATEMENT HERE*/
}

What should be added in place of "/*ADD A STATEMENT HERE*/", so that the function correctly reverses a linked list.
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