Question

Show the status of deque after each operation.

peek()
insertFront(12)
insertRear(67)
deletionFront()
insertRear(43)
deletionRear()
deletionFront()
deletionRear()

Answer 1

Status of deque after each operation:

Operations	Queue Status, Initially Queue is Empty #; f = front, r = rear	Remarks/Output
peek	#	Deque is Empty
insertFront(12)	12 f r	Inserted 12 in Deque
insertRear(67)	12 67 f r	Inserted 67 in Deque
deletionFront()	67	12 is Deleted
insertionRear(43)	67 43 f r	Inserted 43 in Deque
deletionRear()	67 f r	Removed 43 from Deque
deletionFront()	#	Deque is Empty
deletionRear()	Error : Underflow