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Chapter 18: Problem 2

What element is retrieved from a stack by the pop operation?

Short Answer

Expert verified
Answer: The element retrieved by the pop operation is the top element of the stack, which is the most recently added item. In a LIFO structure, the last item added is the first item to be removed.

Step by step solution

01

Definition of a Stack

A stack is a linear data structure that stores items with a Last-In-First-Out (LIFO) order, meaning that the most recently added item to the stack is the first to be removed. Two primary operations can be performed on a stack: push (adding an item to the stack) and pop (removing the top item from the stack).
02

Pop Operation

The pop operation is responsible for removing the top item from the stack. The item that was most recently added to the stack (the last item) is removed by this operation.
03

Element Retrieved by Pop Operation

The element retrieved by the pop operation is the top element of the stack, which is the most recently added item. In a LIFO structure, this should always be the case, as the last item added is the first item to be removed.

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Most popular questions from this chapter

What does FIFO mean?

What is the difference between a static stack and a dynamic stack?

When an element is removed from a queue, where is it removed from?

Suppose the following operations were performed on an empty stack: push (0) push (9) push (12) push (1) Insert numbers in the following diagram to show what will be stored in the static stack after the operations have executed.

Describe two operations that all stacks perform.
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