A Stack Can Be Implemented as a Sequence of Nodes

question 97

Multiple Choice

A stack can be implemented as a sequence of nodes in a linked list or an array list. Which of the following statements about this is correct?

• A) If implementing the stack as a linked list, the least expensive approach is to add and remove elements at the end.
• B) If implementing the stack as an array list, the least expensive approach is to add and remove elements at the end.
• C) If implementing the stack as an array list, there is no cost difference whether adding and removing elements at the beginning or the end.
• D) If implementing the stack as a linked list, there is no cost difference whether adding and removing elements at the beginning or the end.

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