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Which of the following sorting algorithm is NOT stable?

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in Data Structures & Algorithms II by (111k points)
Which of the following sorting algorithm is NOT stable?

(a) Quick sort

(b) Cocktail sort

(c) Bubble sort

(d) Merge sort

The question was asked at a job interview.

The doubt is from Sorting topic in section Sorting of Data Structures & Algorithms II

1 Answer

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Best answer
Right choice is (a) Quick sort

Easy explanation - Out of the given options quick sort is the only algorithm which is not stable. Cocktail sort like bubble sort is a stable sorting algorithm.

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