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Following are the key operations available deque:
insertFront(): This adds an element to the front of the Deque.
insertLast(): This adds an element to the rear of the Deque.
deleteFront(): This deletes an element from the front of the Deque.
deleteLast():This deletes an element from the front of the Deque.
getFront(): This gets an element from the front of the Deque.
getRear(): This gets an element from the rear of the Deque.
isEmpty(): This checks whether Deque is empty or not.
isFull(): This checks whether Deque is full or not.