Circular | Linked List | Question 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++;
}

Answer

Please comment below if you find anything wrong in the above post
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