Stack vs Queue
Feature Stack Queue
Definition A linear data structure that follows LIFO (Last In, First Out). A linear data structure that follows FIFO (First In, First Out).
Insertion/Deletion Happens at the same end (top). Happens at different ends — insert at rear, remove from front.
Example Stack of plates — last plate kept is removed first. Queue of people — first person in line is served first.
Main Operations push(), pop(), peek() enqueue(), dequeue(), front()

Stack => Last in - First Out
you can see it in Ctrl+Z

Queue => First in - First Out
you can see it in Sending Message