## Which case is best for selection sort?

n^2Selection sort / Best complexity

**Why is selection sort best case?**

If we have n values in our array, Selection Sort has a time complexity of O(n²) in the worst case. In the best case, we already have a sorted array but we need to go through the array O(n²) times to be sure! Therefore Selection Sort’s best and worst case time complexity are the same.

**What is the best and worst case of selection sort?**

The number of swaps in Selection Sort are as follows: Worst case: O(N) Average Case: O(N) Best Case: O(1)

### What is the best case complexity in terms of the number of comparisons for selection sort sorting an array of n elements?

O(N)

Best case complexity is of O(N) while the array is already sorted. Number of swaps reduced than bubble sort. For smaller values of N, insertion sort performs efficiently like other quadratic sorting algorithms.

**What is the best case complexity of selection sort Mcq?**

O(n2)

Explanation: The best, average and worst case complexities of selection sort is O(n2).

**How many comparisons does selection sort require in the best case?**

If you think about it, you will see that regardless of the actual items to be sorted, or the original order of those items, 36 comparisons will always be required to sort eight items using the selection sort method.

## What is the best case running time for selection sort?

Ω(N2)

Time and Space Complexity Comparison Table :

Sorting Algorithm | Time Complexity | |
---|---|---|

Best Case | Worst Case | |

Selection Sort | Ω(N2) | O(N2) |

Insertion Sort | Ω(N) | O(N2) |

Merge Sort | Ω(N log N) | O(N log N) |

**What is the best time complexity of selection sort?**

Ω(n^2)

Time Complexities of all Sorting Algorithms

Algorithm | Time Complexity | |
---|---|---|

Best | Worst | |

Selection Sort | Ω(n^2) | O(n^2) |

Bubble Sort | Ω(n) | O(n^2) |

Insertion Sort | Ω(n) | O(n^2) |

**What is the best case time complexity of selection sort?**

Time and Space Complexity Comparison Table :

Sorting Algorithm | Time Complexity | Space Complexity |
---|---|---|

Best Case | Worst Case | |

Selection Sort | Ω(N2) | O(1) |

Insertion Sort | Ω(N) | O(1) |

Merge Sort | Ω(N log N) | O(N) |

### What is the average case complexity of selection sort?

Explanation: The best, average and worst case complexities of selection sort is O(n2).

**In which cases are the time complexities the same for selection sort?**

Time Complexities of all Sorting Algorithms

Algorithm | Time Complexity | |
---|---|---|

Best | Average | |

Selection Sort | Ω(n^2) | θ(n^2) |

Bubble Sort | Ω(n) | θ(n^2) |

Insertion Sort | Ω(n) | θ(n^2) |