Q12.webp

Question: 12
(Choose 1 answer)
Specify the correct implementation of dequeue() method of a queue. This queue uses java.util.LinkedList for
storing data and the head of the list is treated as the head of the queue. (Choose the most suitable one)
A. Object dequeue()
{ if (isEmpty()) return(null);
return(pool.removeFirst());
B. void dequeue(Object x)
{ if (isEmpty()) return(null);
}
pool.remove(pool.size()-1);
C. Object dequeue()
{if (isEmpty()) return;
return(pool.remove(pool.size()-1));
D. Object dequeue()
{ if (isEmpty()) return(null);
return(pool.removeLast());
}