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Data Structure and Algorithms – Bubble Sort,Quick Sort,Selection Sort Online Test

This online test section contains the next top best multiple-choice type questions answers (MCQs) based on Data Structure and Algorithms related to Bubble Sort,Quick Sort,Selection Sort. This online Quiz / Practice Test is suitable for various exams conducted by various educational organizations. These questions have been selected from previous years question papers of various competitive exams.

📝 Test Instructions

📌 Question Type Questions remain the same unless test is updated

📊 Total Questions 25

⏳ Time Limit 20 Minutes

🏆 Points 1 Point for each Question

TIME LEFT : 0

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Question 1 of 25

Q-1. Suppose we are sorting an array of eight integers using quick sort, and we have just finished the first partitioning with the array looking like this: 2 5 1 7 9 12 11 10 Which statement is correct?

The pivot could be either the 7 or the 9.

The pivot is not the 7, but it could be the 9.

The pivot could be the 7, but it is not the 9.

Neither the 7 nor the 9 is the pivot

Your Answer : Correct

Your Answer : Incorrect

Question 2 of 25

Q-2. What is the worst-case time for heap sort to sort an array of n elements?

O(log n)

O(n)

O(n log n)

O(n²)

Your Answer : Correct

Your Answer : Incorrect

Question 3 of 25

Q-3. Suppose we are sorting an array of eight integers using heap sort, and we have just finished one of the reheapifications downward. The array now looks like this: 6 4 5 1 2 7 8 How many reheapifications downward have been performed so far?

1

3 or 4

2

5 or 6

Your Answer : Correct

Your Answer : Incorrect

Question 4 of 25

Q-4. Time complexity of inserting an element to a heap of n elements is of the order of

log2 n (log base 2 )n

n^2

n log2n (nlogbase2n)

n

Your Answer : Correct

Your Answer : Incorrect

Question 5 of 25

Q-5. A min heap is the tree structure where smallest element is available at the

leaf

root

intermediate parent

any where

Your Answer : Correct

Your Answer : Incorrect

Question 6 of 25

Q-6. In the quick sort method , a desirable choice for the portioning element will be

first element of list

last element of list

median of list

any element of list

Your Answer : Correct

Your Answer : Incorrect

Question 7 of 25

Q-7. Quick sort is also known as

merge sort

bubble sort

heap sort

none

Your Answer : Correct

Your Answer : Incorrect

Question 8 of 25

Q-8. Which design algorithm technique is used for quick sort

Divide and conqueror

greedy

backtrack

dynamic programming

Your Answer : Correct

Your Answer : Incorrect

Question 9 of 25

Q-9. Which among the following is fastest sorting technique (for unordered data)

Heap sort

Selection Sort

Quick Sort

Bubble sort

Your Answer : Correct

Your Answer : Incorrect

Question 10 of 25

Q-10. In which searching technique elements are eliminated by half in each pass

Linear search

both

Binary search

none

Your Answer : Correct

Your Answer : Incorrect

Question 11 of 25

Q-11. What is Bubble Sort primarily used for?

Searching for an element in an array

Sorting elements in an array

Removing duplicates from an array

Concatenating two arrays

Your Answer : Correct

Your Answer : Incorrect

Question 12 of 25

Q-12. What is the time complexity of Selection Sort in the worst-case scenario for an array of n elements?

O(1)

O(log n)

O(n)

O(n^2)

Your Answer : Correct

Your Answer : Incorrect

Question 13 of 25

Q-13. What is the time complexity of Insertion Sort in the worst-case scenario for an array of n elements?

O(1)

O(log n)

O(n)

O(n^2)

Your Answer : Correct

Your Answer : Incorrect

Question 14 of 25

Q-14. What is the time complexity of Merge Sort in the worst-case scenario for an array of n elements?

O(1)

O(log n)

O(n)

O(n log n)

Your Answer : Correct

Your Answer : Incorrect

Question 15 of 25

Q-15. What is the time complexity of QuickSort in the worst-case scenario for an array of n elements?

O(1)

O(log n)

O(n)

O(n^2)

Your Answer : Correct

Your Answer : Incorrect

Question 16 of 25

Q-16. What is the time complexity of Heap Sort in the worst-case scenario for an array of n elements?

O(1)

O(log n)

O(n)

O(n log n)

Your Answer : Correct

Your Answer : Incorrect

Question 17 of 25

Q-17. What is the primary characteristic of non-comparison-based sorting algorithms?

They use a comparison operation to sort elements.

They rely on swapping elements to achieve sorting.

They do not use comparisons between elements to determine their order.

They are slower than comparison-based algorithms.

Your Answer : Correct

Your Answer : Incorrect

Question 18 of 25

Q-18. Which of the following is a non-comparison-based sorting algorithm suitable for sorting integers within a specified range?

Merge Sort

QuickSort

Radix Sort

Selection Sort

Your Answer : Correct

Your Answer : Incorrect

Question 19 of 25

Q-19. What is the main challenge that external sorting algorithms address?

Sorting elements with complex data structures

Sorting elements in ascending order

Sorting elements in memory-constrained environments

Sorting elements using comparison-based techniques

Your Answer : Correct

Your Answer : Incorrect

Question 20 of 25

Q-20. In external sorting, what is the primary reason for dividing the data into smaller chunks before sorting?

To improve the sorting speed

To reduce the overall storage space required

To ensure the data is sorted correctly

To simplify the sorting process

Your Answer : Correct

Your Answer : Incorrect

Question 21 of 25

Q-21. What do internal sorting algorithms primarily operate on?

Data stored in external storage devices

Data stored in main memory (RAM)

Data stored on secondary storage (e.g., hard drives)

Data distributed across a network

Your Answer : Correct

Your Answer : Incorrect

Question 22 of 25

Q-22. Which of the following algorithms is considered an efficient internal sorting algorithm with a worst-case time complexity of O(n log n)?

Bubble Sort

Insertion Sort

QuickSort

Selection Sort

Your Answer : Correct

Your Answer : Incorrect

Question 23 of 25

Q-23. Which of the following external sorting algorithms is known for its efficiency and widespread use in practice?

Bubble Sort

Merge Sort

QuickSort

Heap Sort

Your Answer : Correct

Your Answer : Incorrect

Question 24 of 25

Q-24. What is the key idea behind Radix Sort?

Comparing elements in pairs to determine their order.

Dividing the array into two subarrays and merging them.

Sorting elements based on their most significant digit to least significant digit (or vice versa).

Randomly selecting elements to sort.

Your Answer : Correct

Your Answer : Incorrect

Question 25 of 25

Q-25. What data structure is used to implement a heap in Heap Sort?

Linked list

Queue

Array

Tree

Your Answer : Correct

Your Answer : Incorrect

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