Stack operations | Mrs.B.Vijayalakshmi | Department of Computer Science

Stack Operations in Data Structures
In this foundational data structures lecture, Mrs. B. Vijayalakshmi from the Department of Computer Science explains the concept of a Stack. A stack is a linear data structure that follows a particular order in which operations are performed—specifically the LIFO (Last In, First Out) principle.

This session provides a comprehensive look at how data is managed within a stack and the essential operations that govern its behavior in computer memory.

Key Topics Covered:
What is a Stack? Understanding the LIFO principle using real-world analogies like a stack of plates or a deck of cards.

Core Stack Operations:

PUSH: The process of adding a new element to the top of the stack.

POP: The process of removing the top element from the stack.

PEEK (or TOP): Viewing the top element without removing it.

isEmpty: Checking if the stack is empty to prevent errors.

isFull: Checking if the stack has reached its maximum capacity.

Stack Implementation: A brief overview of how stacks are implemented using Arrays and Linked Lists.

Understanding Stack Conditions:

Overflow: What happens when you try to PUSH into a full stack.

Underflow: What happens when you try to POP from an empty stack.

Applications of Stacks: How stacks are used in function calls, undo mechanisms in software, and expression parsing (infix to postfix).

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