Question

quicksort begins by selecting a ___ to base the division of the algorithm by.
select one
a. item
b. all of these
c. pivot
d. key

Explanation:

Quicksort is a sorting algorithm. In quicksort, we select a pivot element. The pivot is used to partition the array into two sub - arrays. The items less than the pivot are placed on one side and the items greater than the pivot are placed on the other side. The term "key" is related to the value that is used for comparison (which is part of the pivot operation in a sense). And "item" is a general term for the elements in the array which are being sorted based on the pivot (key). So all of these (item, pivot, key) are relevant as the pivot is selected (which is an item and has a key for comparison) to start the quicksort division.

Answer:

B. All of these