public interface DSQueueInterface<T>
{
  void enqueue(T element) throws DSQueueOverflowException;
  // Adds an element to the end of the queue.
  
  T dequeue() throws DSQueueUnderflowException;
  // Remove an element from the front of the queue.
  
  boolean isFull();
  
  boolean isEmpty();
  
  int size();
  // Returns number of elements currently stored in the queue.

}