Which one of the following sorting algorithms has the worst running time if the input array is already sorted?
Emily Sparks
Published Jan 22, 2026
That said, there are many sorting algorithms that have similar time complexity for the best case scenario (i.e. already sorted), and bubble sort has a worst case of O(n2).That said, there are many sorting algorithms that have similar time complexity for the best case scenario (i.e. already sorted), and bubble sort Although bubble sort is one of the simplest sorting algorithms to understand and implement, its O(n2) complexity means that its efficiency decreases dramatically on lists of more than a small number of elements. › wiki › Bubble_sort
Which of the following sorting algorithms is the slowest worst case time?
The correct option is b Bubble sort.
Which sorting algorithm is best in worst case?
Analysis of sorting techniques :
When order of input is not known, merge sort is preferred as it has worst case time complexity of nlogn and it is stable as well.
Which of the following sorting algorithms has a running time that is least dependent on the initial ordering of the input?
Of the following sorting algorithms, which has a running time that is least dependent on the initial ordering of the input? Explanation: In Insertion sort if the array is already sorted then it takes O(n) and if it is reverse sorted then it takes O(n2) to sort the array.
Which of the following algorithms has worst time complexity Mcq?
What is the worst case time complexity of merge sort? Explanation: The time complexity of merge sort is not affected by worst case as its algorithm has to implement the same number of steps in any case. So its time complexity remains to be O(n log n). 6.
25 related questions foundWhich of the following is the disadvantage of selection sort?
What is the disadvantage of selection sort? Explanation: As the input size increases, the performance of selection sort decreases. Explanation: Since the input array is not sorted, bubble sort takes 5 iterations and selection sort takes 4(n-1) iterations.
Which sorting algorithm is approximately the same worst case running time behavior in O Nlogn?
At least (B) is correct, because both heap sort and merge sort have O(n log(n)) average and worst case complexity.
Which sorting algorithm is fastest in worst case?
If you've observed, the time complexity of Quicksort is O(n logn) in the best and average case scenarios and O(n^2) in the worst case. But since it has the upper hand in the average cases for most inputs, Quicksort is generally considered the “fastest” sorting algorithm.
Which sorting algorithm has the lowest time complexity?
The time complexity of Quicksort is O(n log n) in the best case, O(n log n) in the average case, and O(n^2) in the worst case. But because it has the best performance in the average case for most inputs, Quicksort is generally considered the “fastest” sorting algorithm.
Which of the given sorting technique has the worst case functioning time less than O N * N?
Quicksort is a well-known sorting algorithm that, on average, makes O(n log n) comparisons to sort n items. However, in the worst case, it makes O(n2) comparisons.
Which of the following examples represent the worst case input for an insertion sort?
10. Which of the following examples represent the worst case input for an insertion sort? Explanation: An array sorted in reverse order is the worst case input for an insertion sort algorithm, and its running time is quadratic.
Which of the following sorting algorithm does not have a worst case running time of O N 2 )?
3. Which of the following sorting algorithms does not have a worst case running time of O(n2 )? Insertion, Quick and bubble all have worst case time complexity of O(n2). Only merge sort has the worst case running time of O(nlogn).
Which of the following sorting techniques performs the best in average case?
Explanation: A quick sort algorithm's best and average case analyses are found to be O mathematically (N log N). 3. Which of the following sorting algorithms is used along with quick sort to sort the sub arrays?
What is the complexity of bubble sort algorithm?
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 running time of bubble sort?
Bubble sort has an average and worst-case running time of O ( n 2 ) O\big(n^2\big) O(n2), so in most cases, a faster algorithm is more desirable.
What is the best case and worst case time complexity of the bubble sort?
Bubble Sort is an easy-to-implement, stable sorting algorithm with a time complexity of O(n²) in the average and worst cases – and O(n) in the best case. You will find more sorting algorithms in this overview of all sorting algorithms and their characteristics in the first part of the article series.
Which algorithm is the best sorting method in place with no quadratic worst case scenarios?
Answer. Explanation: Quick sort is best sorting algorithm.