Heap sort MCQs

By: Prof. Dr. Fazal Rehman | Last updated: May 15, 2025

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1. : What is the primary purpose of Heap Sort?



2. : What is the time complexity of Heap Sort in the worst case?



3. : Which data structure is used to implement Heap Sort?



4. : What is the space complexity of Heap Sort?



5. : How does Heap Sort differ from other sorting algorithms?



6. : What type of heap is commonly used in Heap Sort?



7. : What is the main advantage of Heap Sort over Quick Sort?



8. : What is the first step in the Heap Sort algorithm?



9. : In a Max-Heap, which of the following statements is true?



10. : What happens during the heapify process?



11. : What is the effect of using a Min-Heap in Heap Sort?



12. : What is the time complexity of building a heap?



13. : Which of the following best describes the overall process of Heap Sort?



14. : What is the maximum height of a binary heap?



15. : Which of the following is not a property of a heap?



16. : What will be the output of Heap Sort on the array [4, 10, 3, 5, 1]?



17. : In Heap Sort, what is done after the heap is built?



18. : What type of sorting algorithm is Heap Sort classified as?



19. : Which step is repeated until the heap is empty in Heap Sort?



20. : What is the purpose of the “sift down” operation in Heap Sort?



21. : Which of the following statements about Heap Sort is true?



22. : How is the time complexity of Heap Sort affected by the size of the input?



23. : What is the primary disadvantage of Heap Sort compared to Quick Sort?



24. : Which of the following operations is not performed in Heap Sort?



25. : What will be the output of applying Heap Sort on the array [8, 4, 7, 3, 2]?



26. : What is the initial step in the Heap Sort algorithm?



27. : In a Min-Heap, which statement is true?



28. : How does the performance of Heap Sort compare to Merge Sort in practice?



29. : What is the effect of using a binary heap for sorting?



30. : What is the process of “sifting up” in a heap?



31. : What happens to the structure of a heap during Heap Sort?



32. : Which of the following sorting algorithms is not comparison-based?



33. : What is a key factor in determining the efficiency of Heap Sort?



34. : Which operation is required to convert an array into a heap?



35. : What kind of trees are heaps?



36. : How is the root node in a Max-Heap related to its children?



37. : What is the effect of reducing the size of the heap during Heap Sort?



38. : In Heap Sort, what is done after the largest element is extracted from the heap?



 

 

Data Structures MCQs

Basic Concepts

  1. Introduction to Data Structures
  2. Complexity Analysis MCQs

Linear Data Structures MCQs

  1. Arrays MCQs
  2. Linked Lists MCQs
  3. Stacks MCQs
  4. Queues MCQs

Non-Linear Data Structures MCQs

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  2. Heaps MCQs
  3. Graphs MCQs

Hashing MCQs MCQs

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Sorting and Searching Algorithms MCQs 

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