What is the purpose of the pivot value in quicksort


Problem

1. When does quicksort work best, and when does it work worst?

2. What is the purpose of the pivot value in quicksort? How did we first select it in the text, and what is wrong with that approach for choosing a pivot value?

3. For the following array

30 40 20 15 60 80 75 4 20

Show the new array after each pass of insertion sort and selection sort. How many comparisons and exchanges are performed by each?

The response should include a reference list. Double-space, using Times New Roman 12 pnt font, one-inch margins, and APA style of writing and citations.

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Data Structure & Algorithms: What is the purpose of the pivot value in quicksort
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