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Heap sort is an implementation of ____________ using a descending priority queue.

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Heap sort is an implementation of ____________ using a descending priority queue.

(a) insertion sort

(b) selection sort

(c) bubble sort

(d) merge sort

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This question is from Heapsort in section Sorting of Data Structures & Algorithms II

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Right choice is (b) selection sort

Explanation: Heap sort is an implementation of selection sort using the input array as a heap representing a descending priority queue. Heap sort algorithm is divided into two phase. In first phase the max-heap is created and the second phase (selection phase) deletes the elements from the priority queue using siftdown operation.

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