Data Structures | Linked List | Question 16
You are given pointers to first and last nodes of a singly linked list, which of the following operations are dependent on the length of the linked list?
Delete the first element
Insert a new element as a first element
Delete the last element of the list
Add a new element at the end of the list
a) Can be done in O(1) time by deleting memory and changing the first pointer. b) Can be done in O(1) time, see push() here c) Delete the last element requires pointer to previous of last, which can only be obtained by traversing the list. d) Can be done in O(1) by changing next of last and then last.
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