1. What is a Stack? A stack is a simple data structure that follows the Last-In, First-Out (LIFO) principle. It's akin to a stack of books, where the most recent addition is at the top and easily ...

Stack is a list that has a restriction that insertion and deletion will happen only at one end that is called as Top. push(int data): Time complexity should be O(1). pop(int data): Time complexity ...