Stack And Queue Question:

Stack is a data structure that follows Last in First out strategy.

Stack Operations:-

Push – Pushes (inserts) the element in the stack. The location is specified by the pointer.
Pop – Pulls (removes) the element out of the stack. The location is specified by the pointer
Swap: - the two top most elements of the stack can be swapped
Peek: - Returns the top element on the stack but does not remove it from the stack
Rotate:- the topmost (n) items can be moved on the stack in a rotating fashion

A stack has a fixed location in the memory. When a data element is pushed in the stack, the pointer points to the current element.