The concatenation of two lists is to be performed in O(1) time. Which – McqOptions

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1.	The concatenation of two lists is to be performed in O(1) time. Which of the following implementations of a list could be used ?
A.	Array Implementation of List
B.	Singly Linked List
C.	Circular Doubly Linked List
D.	Doubly Linked List
Answer» D. Doubly Linked List

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