What are the differences between queues and stacks in computing?

What are the differences between queues and stacks in computing?

Queues and stacks are both data structures used to store collections of elements, but they operate differently. A stack follows the Last In First Out (LIFO) principle, meaning the last element added is the first one to be removed. In contrast, a queue follows the First In First Out (FIFO) principle, where the first element added is the first one to be removed.

Can you give me examples of where each is used?

Sure! Stacks are often used in function call management, like in programming languages for handling function calls and returns. Queues are commonly used in scenarios like print job management or task scheduling, where tasks are processed in the order they arrive.

What are the advantages of using one over the other?

The advantage of using a stack is that it allows for easy backtracking, such as in undo mechanisms in applications. Queues are advantageous for managing tasks that need to be processed in order, ensuring fairness and efficiency in task handling.

Are there any hybrid structures that combine both?

Yes, there are hybrid structures like deque (double-ended queue) that allow insertion and removal of elements from both ends, combining features of both stacks and queues.