Applications of heaps (priority queues, heap sort) MCQs

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

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1. : Which data structure is primarily used to implement a priority queue?





2. : What is the time complexity of inserting an element into a priority queue implemented using a heap of size 𝑛?





3. : Which sorting algorithm uses a heap as its data structure?





4. : What is the worst-case time complexity of heap sort for sorting 𝑛 elements?





5. : In heap sort, what is the process used to build a max-heap from an array?





6. : Which of the following is a primary advantage of using a priority queue?





7. : Which operation is typically used to remove the maximum element from a max-heap in a priority queue?





8. : In a min-heap-based priority queue, what operation retrieves the minimum element without removing it?





9. : Which sorting algorithm exhibits a stable behavior (preserves the relative order of equal elements)?





10. : Which property of heap sort makes it suitable for applications requiring in-place sorting?





11. : Which operation is used to convert an unordered array into a heap in heap sort?





12. : What is the main disadvantage of using a heap-based priority queue compared to other data structures?





13. : Which application often requires efficient priority queue operations?





14. : In a priority queue implemented using a min-heap, what is the root element?





15. : Which data structure does not use a heap for its implementation?





16. : What is the primary benefit of using heap sort over other sorting algorithms?





17. : Which operation in a priority queue is similar to removing the root in a heap?





18. : Which property must be maintained during the heapify process in heap sort?





19. : Which operation is not typically supported directly by a heap-based priority queue?





20. : Which sorting algorithm is generally preferred when stable sorting is not a requirement?





   

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
  1. Trees MCQs
  2. Heaps MCQs
  3. Graphs MCQs
Hashing MCQs MCQs
  1. Hash Tables
Sorting and Searching Algorithms MCQs 
  1. Sorting Algorithms MCQs
  2. Searching Algorithms MCQs
Miscellaneous
  1. Memory Management in data structures MCQs
  2. String Manipulation Algorithms MCQs
  1. Data Structures MCQs 1
  2. Data Structures MCQs 2
  3. Data Structures MCQs 3
  4. Data Structures MCQs 4
  5. Data Structures MCQs 5
  6. Stacks Solved MCQs
  7. Queues MCQs
  8. pointer mcqs
  9. Array MCQs
 

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