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Shell sort is an improvement on ____

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in Data Structures & Algorithms II by (111k points)
Shell sort is an improvement on ____

(a) insertion sort

(b) selection sort

(c) binary tree sort

(d) quick sort

This question was posed to me in a job interview.

Question is taken from Shell sort in section Sorting of Data Structures & Algorithms II

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Right choice is (a) insertion sort

The best explanation: Shell sort is an improvement on insertion sort that allows the exchange of elements that are far apart. Shell sort algorithm sorts separate sub-arrays of the original input array. These sub-arrays contains every hth element of the original array.

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