What is Bubble Sort primarily used for?
A) To search for an element
B) To sort an array
C) To merge two arrays
D) To partition data
Answer: B) To sort an array
What is the best-case time complexity of Bubble Sort?
A) O(n)
B) O(n log n)
C) O(n^2)
D) O(log n)
Answer: A) O(n)
Which statement best describes the working of Bubble Sort?
A) It selects the smallest element and swaps it to the front.
B) It compares adjacent elements and swaps them if they are in the wrong order.
C) It divides the array into two halves and sorts them independently.
D) It uses a divide-and-conquer approach to sort the array.
Answer: B) It compares adjacent elements and swaps them if they are in the wrong order.
What is the worst-case time complexity of Bubble Sort?
A) O(n)
B) O(log n)
C) O(n log n)
D) O(n^2)
Answer: D) O(n^2)
In which scenario is Bubble Sort most efficient?
A) When the data is already sorted
B) When the data is in random order
C) When the data has many duplicates
D) When the data is large
Answer: A) When the data is already sorted
How many passes does Bubble Sort typically require to sort an array?
A) n
B) n/2
C) n-1
D) n^2
Answer: C) n-1
What is the space complexity of Bubble Sort?
A) O(1)
B) O(n)
C) O(n log n)
D) O(n^2)
Answer: A) O(1)
Which of the following is true about Bubble Sort?
A) It is a stable sorting algorithm.
B) It is not a stable sorting algorithm.
C) It can sort data in descending order only.
D) It uses additional memory for sorting.
Answer: A) It is a stable sorting algorithm.
What happens when a single pass of Bubble Sort completes without any swaps?
A) The array is not sorted yet.
B) The algorithm continues to the next pass.
C) The algorithm terminates early, indicating that the array is sorted.
D) The algorithm starts over from the beginning.
Answer: C) The algorithm terminates early, indicating that the array is sorted.
Which of the following is a drawback of Bubble Sort?
A) It is difficult to implement.
B) It has a high time complexity for large datasets.
C) It does not handle negative numbers.
D) It requires extra memory for sorting.
Answer: B) It has a high time complexity for large datasets.
What is the average-case time complexity of Bubble Sort?
A) O(n)
B) O(n log n)
C) O(n^2)
D) O(log n)
Answer: C) O(n^2)
Which of the following algorithms is similar in nature to Bubble Sort?
A) Selection Sort
B) Merge Sort
C) Quick Sort
D) Insertion Sort
Answer: A) Selection Sort
In Bubble Sort, what is the main factor that determines whether two elements are swapped?
A) Their values
B) Their indices
C) Their positions in the array
D) Their data types
Answer: A) Their values
How can Bubble Sort be optimized?
A) By using a hash table
B) By reducing the number of passes
C) By stopping when no swaps occur in a pass
D) By using a recursive approach
Answer: C) By stopping when no swaps occur in a pass
What is the output of Bubble Sort if the input array is [5, 4, 3, 2, 1]?
A) [1, 2, 3, 4, 5]
B) [5, 4, 3, 2, 1]
C) [3, 2, 1, 5, 4]
D) [1, 5, 4, 3, 2]
Answer: A) [1, 2, 3, 4, 5]
Which of the following is a practical application of Bubble Sort?
A) Sorting large datasets
B) Real-time data processing
C) Educational purposes to teach sorting algorithms
D) Data encryption
Answer: C) Educational purposes to teach sorting algorithms
What is the significance of the inner loop in Bubble Sort?
A) It counts the number of swaps.
B) It compares adjacent elements.
C) It iterates through the entire array.
D) It sorts the array in descending order.
Answer: B) It compares adjacent elements.
In Bubble Sort, how are elements compared?
A) By their values
B) By their positions
C) By their frequencies
D) By their types
Answer: A) By their values
Which is true about the stability of Bubble Sort?
A) It is unstable for equal elements.
B) It maintains the relative order of equal elements.
C) It can sort data with different data types.
D) It requires additional space for stability.
Answer: B) It maintains the relative order of equal elements.
What will happen if Bubble Sort is applied to an array with only one element?
A) The array will be sorted.
B) An error will occur.
C) The array will remain unchanged.
D) The algorithm will loop indefinitely.
Answer: A) The array will be sorted.
Which of the following statements about Bubble Sort is incorrect?
A) It can be implemented using recursion.
B) It is an efficient algorithm for large datasets.
C) It is a comparison-based sorting algorithm.
D) It is simple to understand and implement.
Answer: B) It is an efficient algorithm for large datasets.
What does it mean when we say that Bubble Sort is a “comparison sort”?
A) It uses comparisons to determine the order of elements.
B) It sorts data without comparing values.
C) It requires multiple passes to sort.
D) It can only sort numerical data.
Answer: A) It uses comparisons to determine the order of elements.
What is the main idea behind the name “Bubble Sort”?
A) Elements “bubble” to the top of the array.
B) It uses bubble-like structures to sort.
C) It is a type of floating sort.
D) It sorts elements based on their sizes.
Answer: A) Elements “bubble” to the top of the array.
How does Bubble Sort handle duplicate elements?
A) It ignores them.
B) It sorts them randomly.
C) It maintains their relative order.
D) It moves them to the end.
Answer: C) It maintains their relative order.
What happens to the time complexity of Bubble Sort when the dataset is mostly sorted?
A) It remains O(n^2).
B) It improves to O(n).
C) It becomes O(log n).
D) It increases to O(n log n).
Answer: B) It improves to O(n).
In which programming construct is Bubble Sort commonly implemented?
A) Recursion
B) Iteration
C) Dynamic programming
D) Greedy algorithms
Answer: B) Iteration
Which of the following sorting algorithms is generally less efficient than Bubble Sort?
A) Insertion Sort
B) Selection Sort
C) Merge Sort
D) Quick Sort
Answer: B) Selection Sort
What would be the result of applying Bubble Sort to the array [1, 2, 3, 4, 5]?
A) [1, 2, 3, 4, 5]
B) [5, 4, 3, 2, 1]
C) [3, 1, 2, 4, 5]
D) [2, 1, 3, 4, 5]
Answer: A) [1, 2, 3, 4, 5]
Which sorting method is often taught as an introductory algorithm in computer science?
A) Quick Sort
B) Merge Sort
C) Bubble Sort
D) Heap Sort
Answer: C) Bubble Sort
What is the impact of using a modified version of Bubble Sort that stops when no swaps are made in a pass?
A) It becomes unstable.
B) It improves efficiency for partially sorted data.
C) It requires more memory.
D) It makes the algorithm complex.
Answer: B) It improves efficiency for partially sorted data.
Which of the following scenarios would likely result in the most number of comparisons when using Bubble Sort?
A) Sorted array
B) Reverse sorted array
C) Randomized array
D) Array with all equal elements
Answer: B) Reverse sorted array
What is the main reason why Bubble Sort is not commonly used in practice for large datasets?
A) It is too complex to implement.
B) It is too slow compared to more efficient algorithms.
C) It does not maintain stability.
D) It requires too much memory.
Answer: B) It is too slow compared to more efficient algorithms.
How does the number of comparisons in Bubble Sort relate to the size of the array?
A) It increases linearly.
B) It increases quadratically.
C) It decreases with larger sizes.
D) It remains constant.
Answer: B) It increases quadratically.
What kind of sorting is Bubble Sort classified as?
A) In-place sorting
B) External sorting
C) Comparison-based sorting
D) All of the above
Answer: D) All of the above
Basic Concepts
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