How to implement a queue using Stack?

Two stacks can be used to implement a queue by putting each element onto one stack during enqueue and popping each element into a different stack during dequeue. The first item in the queue will be the element at the top of the second stack. Dequeue and peek operations in this approach take up O(n) time complexity, where n is the number of elements in the queue. However, the method calls for two stacks, which uses more memory. Additionally, because each dequeue operation has a temporal complexity of O(n), where n is the total number of queue components, it might not be the most effective approach to implement a queue.

Some interview questions on data structure are important.