What are the differences between queue and stack implementations?

What are the differences between queue and stack implementations?

Queues and stacks are both data structures, but they operate differently. A stack follows Last In First Out (LIFO) while a queue follows First In First Out (FIFO).

Can you give me an example of how each is implemented?

Sure! A stack can be implemented using an array or linked list, where you push and pop elements. A queue can be implemented using a circular array or linked list, where you enqueue and dequeue elements.

What are some use cases for each data structure?

Stacks are often used in function calls and backtracking algorithms, while queues are used in scheduling tasks and breadth-first search.

Which one is more efficient in terms of memory usage?

Both can be efficient, but it depends on the implementation. Linked lists can save space if the size of the data structure is dynamic, while arrays can be faster for access.