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					 What is the correct method used to insert and delete items from the queue?
 
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- add and remove
 - enqueue and peek
 - push and pop
 - enqueue and dequeue
 - None of these
 
 
Correct Option: D
enqueue is pushing item into queue; dequeue is removing item from queue; peek returns object without removing it from queue.
Stack uses push and pop methods. add and remove are used in the list.