When should I use a stack instead of a deque?

When should I use a stack instead of a deque?

A stack is ideal for LIFO operations, while a deque allows for both ends to be accessed. What specific use case do you have in mind?

I'm working on a browser history feature. Would a stack be better?

Yes, a stack is perfect for browser history as it follows the LIFO principle, allowing users to go back to the most recent page.

What about a task scheduling system? Should I use a deque there?

A deque would be suitable for a task scheduling system since it allows adding and removing tasks from both ends efficiently.

Can you give me an example of when a stack would be less efficient than a deque?

Sure! If you need to frequently access both ends of a collection, a stack would be inefficient compared to a deque.