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Class deque provides:
The ability to add storage at either end of the
deque.
All of the above.
Efficient insertion and deletion operations at the
front and back of a deque.
Efficient indexed access to its elements.

Ask by Harris Li. in the United States
Mar 28,2025

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“All of the above.”

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The Deep Dive

Did you know that the double-ended queue, or deque, has its roots in data structure development dating back to the 1960s? Its name reflects its ability to add and remove items from both ends efficiently. This makes deques especially useful in scenarios like web browser history, where you want to quickly navigate back and forth, or in scheduling tasks, allowing priorities to shift dynamically!
In real-world applications, a deque is highly versatile. For instance, in a job scheduling system, tasks may need to be added or removed from either end based on priority. Another example is in breadth-first search algorithms, where items are processed in a queue-like fashion. Deques can provide optimal performance for these types of tasks, significantly improving efficiency over simpler structures!

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