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What difference does a PriorityQueue introduce in its behavior?
Allows random access to elements
Keeps elements sorted according to their natural order
Sorts elements in FIFO order
Positions elements based on their priority
The correct answer is: Positions elements based on their priority
A priority queue follows a particular order, i.e., the "priority" of the elements. The element with the highest priority is placed at the front of the queue, and so on. This is different from a regular queue, which follows the "first in, first out" (FIFO) rule. Option A is incorrect because priority queues do not allow for random access. Option B is incorrect because it does not necessarily keep elements sorted according to their natural order, only according to their priority. Option C is incorrect because, as mentioned, priority queues do not follow the FIFO rule. Therefore, option D is the correct answer as it accurately describes the unique behavior introduced by a priority queue.