# Which Of The Following Sorting Algorithms Is Not Stable? (2023)

## 1. [Solved] Which of the following is not a stable sorting algorithm in - Testbook

• These sorting algorithms are usually unstable: QuickSort,; Heap Sort,; Selection Sort. QuickSort is an unstable algorithm because we do swapping of elements ...

• The correct answer is option 3. Concept: Stable sorting algorithms: The relative order of records with equal keys is maintained using stable sorting alg

## 2. Stable and Unstable Sorting Algorithms - GeeksforGeeks

• Jul 20, 2023 · And we wish to sort these objects by keys. What is a stable sorting algorithm? A sorting algorithm is said to be stable if two objects with ...

• A Computer Science portal for geeks. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions.

## 3. Stable and unstable sorting algorithms - Educative.io

• Sorting operation. Among these algorithms, a key distinction exists between stable and unstable sorting methods. This answer explores the ...

• Contributor: Fatima Tajammul

## 4. What Is the Meaning of 'Stable' and 'Unstable' for Various Sorting ...

• Jul 18, 2023 · ... these terms in the context of various sorting algorithms, providing a clear understanding for data scientists and software engineers.

• Sorting algorithms are an essential part of data processing in computer science and data analysis. They allow us to arrange data in a specific order, making it easier to search, analyze, and manipulate. When working with sorting algorithms, you may come across the terms 'stable' and 'unstable.' In this article, we will explore the meaning of these terms in the context of various sorting algorithms, providing a clear understanding for data scientists and software engineers.

## 5. Stability in Sorting Algorithms - Interview Kickstart

• Difference Between Stable and Unstable Sorting Algorithms. On the basis of ... These elements are referred to as stable elements. Counting sort, bubble sort ...

• Learn about the importance of stability in sorting algorithms and how it can be achieved. Discover the best practices for maintaining order and consistency in your data. Find out more!

## 6. Stability in Sorting Algorithms — A Treatment of Equality

• Dec 28, 2018 · A stable sorting algorithm maintains the relative order of the items with equal sort keys. An unstable sorting algorithm does not. In other ...

• by Onel Harrison Stability in Sorting Algorithms — A Treatment of Equality Algorithms are at the heart of computer science. Algorithms used for sorting are some of the most fundamental, useful, and consequently, ubiquitous. > Algorithm — a finite set of unambiguous steps for solving a specific problem. We constantly

## 7. Sorting Algorithms that don't Hate You | by Erik Corry - Medium

• This was called absolutely unacceptable, unreasonable, etc. Not a stable sorting algorithm ... In the following animation we show that a half-sized buffer is ...

• (This is a sort of sequel to Hash Maps that don’t Hate You.)

## 8. Which of the following sorting algorithms are stable? I. Insertion ...

• Which of the following sorting algorithms are stable? I. Insertion sort II. Bubble sort. III. Merge sort IV. Heap sort. A. I, II, III and IV. loader. No ...

• Which of the following sorting algorithms are stable?I. Insertion sort II. Bubble sortIII. Merge sort IV. Heap sort

## 9. Stable Sorting Algorithm - Scaler Topics

• Else, move to the next element. Pseudocode : Time complexity analysis. Let us analyze the time complexity of bubble sort through the following steps: In ...

• This article by scaler topics covers the below algorithms in-depth, with their time and space complexity analysis and examples.

## 10. Which of the following is not a stable sorting algorithm?

• Which of the following is not a stable sorting algorithm? (a) Insertion sort (b) Selection sort (c) Bubble sort (d) Merge sort.

• Which of the following is not a stable sorting algorithm? (a) Insertion sort (b) Selection sort (c) Bubble sort (d) Merge sort

## 11. Which of the following sorting algorithm is NOT stable?

• Which of the following sorting algorithm is NOT stable? (a) Introsort (b) Brick sort (c) Bubble sort (d) Merge sort.

• Which of the following sorting algorithm is NOT stable? (a) Introsort (b) Brick sort (c) Bubble sort (d) Merge sort

## 12. Sorting Notes | CS 61B Fall 2021

• ... following comparison sorting algorithms with respect to ... Note that LSD radix sort would not work if distribution counting was not a stable sorting algorithm.

• Author: Kelly Lin

## 13. General Reference Material | Stable Sorting Algorithms

• We make the following observations, without proof, about some common sorting algorithms: InsertionSort and MergeSort are stable. SelectionSort is not ...

• Stable Sorting Algorithms

## 14. MCQs on Sorting with answers - Career Ride

• 1. Which of the following is not a stable sorting algorithm? a) Insertion sort b) Selection sort c) Bubble sort d) ...

• 1. Which of the following is not a stable sorting algorithm?

## 15. Which of the following sorting algorithm is NOT stable? - McqMate

• Q. Which of the following sorting algorithm is NOT stable? A. selection sort. B. brick sort. C. bubble sort. D. merge sort. Answer» A. selection sort ...

• McqMate

## 16. Comparison of Sorting Algorithms - EnjoyAlgorithms

• ... not apply to these sorting algorithms. ... If stability is a concern, merge sort is the best choice because quicksort and heapsort are not stable sorting ...

• Comparison of sorting algorithms based on different parameters helps us choose an efficient sorting approach. In this blog, we have covered these concepts: 1) What is comparison based sorting? 3) Which sorting is best in terms of time complexity? 3) How to compare sorting algorithms in terms of properties like in-place, stability, etc.?

## FAQs

### Which Of The Following Sorting Algorithms Is Not Stable? ›

These sorting algorithms are usually unstable: QuickSort, Heap Sort, Selection Sort.

Is Bubblesort stable or unstable? ›

Is Bubble Sort Stable? Yes, Bubble Sort is a stable sorting algorithm. We swap elements only when A is less than B. If A is equal to B, we do not swap them, hence relative order between equal elements will be maintained.

Is merge sort stable or not? ›

Merge Sort is a stable sort which means that the same element in an array maintain their original positions with respect to each other. Overall time complexity of Merge sort is O(nLogn).

Which sort is not in place and stable? ›

Merge sort is a stable algorithm but not an in-place algorithm. It requires extra array storage.

Which of the following sorting algorithm is or stable? ›

Which of the following sorting algorithm is stable? Explanation: Out of the given options binary insertion sort is the only algorithm which is stable. It is because the elements with identical values appear in the same order in the output array as they were in the input array.

Which sorting is unstable sorting? ›

Heap sort, selection sort, and quicksort are examples of unstable algorithms.

Why is QuickSort not stable? ›

QuickSort is an unstable algorithm because we do swapping of elements according to pivot's position (without considering their original positions).

Is heap sort stable or not? ›

Heapsort is an in-place algorithm, but it is not a stable sort. Heapsort was invented by J. W. J. Williams in 1964. This was also the birth of the heap, presented already by Williams as a useful data structure in its own right.

Are quicksort and Mergesort stable? ›

Merge sort is a stable sorting algorithm, i.e., it maintains the relative order of two equal elements. Quicksort is an unstable sorting algorithm, i.e., it might change the relative order of two equal elements.

Which is stable quicksort or merge sort? ›

Merge sort is better for large data structures: Mergesort is a stable sort, unlike quicksort and heapsort, and can be easily adapted to operate on linked lists and very large lists stored on slow-to-access media such as disk storage or network attached storage.

### Is insertion sort in place and stable? ›

Yes. Insertion sort is a stable sort. During the selection sort process, we will only swap the ordering of any two items if the item on the right is less than the item to its left.

What is a stable or unstable algorithm? ›

If a sorting algorithm is said to be "unstable", this means that for any items that rank the same, the order of the tied members is not guaranteed to stay the same with successive sorts of that collection. For a 'stable' sort, the tied entries will always end up in the same order when sorted.

Is bucket sort a stable algorithm? ›

Bucket sort is stable if the internal sorting algorithm used to sort it is also stable. Merge sort and insertion sort are examples of stable sorting algorithms that can be used internally. Quicksort is an example of unstable sorting algorithms.

Is Shell sort a stable algorithm? ›

Unlike insertion sort, Shellsort is not a stable sort since gapped insertions transport equal elements past one another and thus lose their original order. It is an adaptive sorting algorithm in that it executes faster when the input is partially sorted.

Is bubble sort adaptable? ›

Yes. In adaptive algorithms, the complexity (running time, performance) changes based on whether or not the input array is sorted. They perform better when the input is sorted. Bubble sort is adaptive because when the input is already sorted, the complexity is O(N) (best case).

What is the complexity of bubble sort? ›

The bubble sort algorithm is a reliable sorting algorithm. This algorithm has a worst-case time complexity of O(n2). The bubble sort has a space complexity of O(1).

What is the time complexity of bubble sort? ›

The Bubble Sort algorithm has a time complexity of O(N2) and a space complexity of O(1) since it does not require any additional memory space apart from a temporary variable used for swapping.

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