What is the difference between a deque and a queue?

What is the difference between a deque and a queue?

A queue is a linear data structure that follows the First In First Out (FIFO) principle, while a deque (double-ended queue) allows insertion and deletion from both ends.

Can you give me an example of when to use a deque instead of a queue?

Sure! Use a deque when you need to add or remove elements from both ends, like in a palindrome checker or a sliding window algorithm.

Are there any performance differences between them?

Yes, both have O(1) time complexity for adding and removing elements, but the implementation may vary, affecting performance in specific scenarios.

Which programming languages support deques?

Most programming languages have built-in support for deques, including Python (collections.deque), C++ (std::deque), and Java (ArrayDeque).