An iterator is currently pointing to the correct location for insertion or removal of a doubly-linked list.Which of the following statements about doubly-linked list operations is correct?
A)The most expensive operation of a doubly-linked is to add an element at the end.
B)The most expensive operation of a doubly-linked is to remove an element at the end.
C)The most expensive operation of a doubly-linked is to add an element in the middle.
D)The most expensive operation of a doubly-linked is to add an element at the front.

Question

Quizplus · Accepted Answer

Inserting or removing an element in the middle of a doubly-linked list can be more expensive because it requires updating multiple pointers, whereas operations at the ends are generally more straightforward.

An Iterator Is Currently Pointing to the Correct Location for Insertion