# Question: What Is Best Time Complexity?

## What is bubble sort time complexity?

Bubble sort has a worst-case and average complexity of О(n2), where n is the number of items being sorted.

Most practical sorting algorithms have substantially better worst-case or average complexity, often O(n log n).

When the list is already sorted (best-case), the complexity of bubble sort is only O(n)..

## Which is the slowest sorting procedure?

Discussion ForumQue.Out of the following, the slowest sorting procedure isb.Heap Sortc.Shell Sortd.Bubble SortAnswer:Bubble Sort1 more row

## Why is bubble sort N 2?

N. So it is simply representing a number not how many times a loop, loops. This is another version to speed up bubble sort, when we use just a variable swapped to terminate the first for loop early. You can gain better time complexity.

## What is the big O of merge sort?

Merge sortAn example of merge sort. First divide the list into the smallest unit (1 element), then compare each element with the adjacent list to sort and merge the two adjacent lists. Finally all the elements are sorted and merged.ClassSorting algorithmData structureArrayWorst-case performance3 more rows

## What is the best time complexity of bubble sort?

The main advantage of Bubble Sort is the simplicity of the algorithm. The space complexity for Bubble Sort is O(1), because only a single additional memory space is required i.e. for temp variable. Also, the best case time complexity will be O(n), it is when the list is already sorted.

## Is O N better than O Logn?

O(log n) is better. O(logn) means that the algorithm’s maximum running time is proportional to the logarithm of the input size. O(n) means that the algorithm’s maximum running time is proportional to the input size. … therefore, O(logn) is tighter than O(n) and is also better in terms of algorithms analysis.

## Why time complexity is an important issue?

The better the time complexity of an algorithm is, the faster the algorithm will carry out his work in practice. Apart from time complexity, its space complexity is also important: This is essentially the number of memory cells which an algorithm needs. A good algorithm keeps this number as small as possible, too.

## How is bubble sort complexity calculated?

To calculate the complexity of the bubble sort algorithm, it is useful to determine how many comparisons each loop performs. For each element in the array, bubble sort does n − 1 n-1 n−1 comparisons. In big O notation, bubble sort performs O ( n ) O(n) O(n) comparisons.

## What is average case time complexity?

In computational complexity theory, the average-case complexity of an algorithm is the amount of some computational resource (typically time) used by the algorithm, averaged over all possible inputs. The analysis of such algorithms leads to the related notion of an expected complexity. …

## Why is bubble sort bad?

Bubble Sort is one of the most widely discussed algorithms, simply because of its lack of efficiency for sorting arrays. If an array is already sorted, Bubble Sort will only pass through the array once (using concept two below), however the worst case scenario is a run time of O(N²), which is extremely inefficient.

## Is bubble sort stable?

YesBubble sort/Stable

## How do you calculate time complexity?

The time complexity, measured in the number of comparisons, then becomes T(n) = n – 1. In general, an elementary operation must have two properties: There can’t be any other operations that are performed more frequently as the size of the input grows.