What are the differences between Stack and Queue? Implement both data structures.

🔢 Data Structures And Algorithm• 9/21/2025
Understanding LIFO vs FIFO data structures with implementations and use cases for stacks and queues.

Stack vs Queue Comparison

Stack (LIFO - Last In, First Out)

Operations:

  • push() - Add element to top
  • pop() - Remove element from top
  • peek()/top() - View top element
  • isEmpty() - Check if empty

Use Cases:

  • Function call management
  • Expression evaluation
  • Undo operations
  • Browser history

Queue (FIFO - First In, First Out)

Operations:

  • enqueue() - Add element to rear
  • dequeue() - Remove element from front
  • front() - View front element
  • isEmpty() - Check if empty

Use Cases:

  • Process scheduling
  • BFS traversal
  • Print queue
  • Handling requests in web servers
By: System Admin