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Q.
In linked lists there are no NULL links in

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MCQ
1.
To delete a node from the end of a linked list, the list is traversed up to the last ______.
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MCQ
2.
What is the time complexity improvement of skip lists from linked lists in insertion and deletion?
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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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4.
Consider linked list is used to implement the Stack then which of the following node is considered as Top of the Stack ?
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5.
What is the functionality of the following piece of code?
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