Which of the following algorithm pays the least attention to the ordering of the elements in the input list?Insertion sort Selection sort Quick sort None
Question
Which of the following algorithm pays the least attention to the ordering of the elements in the input list?
- Insertion sort
- Selection sort
- Quick sort
- None
Solution
The algorithm that pays the least attention to the ordering of the elements in the input list is the Selection sort.
Here's why:
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Insertion Sort: This algorithm sorts the list by shifting elements one at a time into the correct position. The order of the elements in the input list can significantly affect its performance. For example, if the input list is already sorted, the best case scenario, the complexity is O(n), but if the list is sorted in reverse order, the worst case scenario, the complexity is O(n^2).
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Selection Sort: This algorithm sorts an array by repeatedly finding the minimum element from the unsorted part and putting it at the beginning. The order of the elements in the input list does not affect its performance, as it always performs O(n^2) operations, making it indifferent to the input order.
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Quick Sort: This algorithm is a divide and conquer algorithm. It picks an element as pivot and partitions the given array around the picked pivot. The order of the elements in the input list can significantly affect its performance. For example, if the pivot elements are always the median of the list, it results in the best case scenario with O(n log n) complexity. But if the pivot elements are always the smallest or largest element, it results in the worst case scenario with O(n^2) complexity.
So, among the three, Selection Sort pays the least attention to the ordering of the elements in the input list.
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