16/02/2026
Understanding the difference between a stack and a queue is one of those small concepts that makes a big difference in programming.
A stack works like a stack of books.
You place a book on top, and you remove the one on top first.
Last In, First Out (LIFO).
A queue works like a line at a store.
The first person to join the line is the first to be served.
First In, First Out (FIFO).
If you’re learning data structures or preparing for interviews, make sure this is crystal clear.
