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Which of the following sorting algorithm is best suited if the elements are already sorted?

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in Data Structures & Algorithms II by (111k points)
Which of the following sorting algorithm is best suited if the elements are already sorted?

(a) Heap Sort

(b) Quick Sort

(c) Insertion Sort

(d) Merge Sort

I got this question during an online interview.

I'd like to ask this question from Insertion sort in chapter Sorting of Data Structures & Algorithms II

1 Answer

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Best answer
Right option is (c) Insertion Sort

The best I can explain: The best case running time of the insertion sort is O(n). The best case occurs when the input array is already sorted. As the elements are already sorted, only one comparison is made on each pass, so that the time required is O(n).

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