## Help authour, Buy PDF Ebook
>>>**Click Here**<<<

## Quicksort Multiple choice Questions and Answers (MCQs)

Question 1 |

Quick sort is a .....

greedy algorithm | |

divide and conquer algorithm | |

dynamic programming algorithm | |

backtracking algorithm |

**EVS Questions answers**

Question 1 Explanation:

Quick sort is a divide and conquer algorithm. Quick sort first partitions a large array into two smaller sub-arrays. And then recursively sorts the sub-arrays.

Question 2 |

What is the worst case time complexity of the Quick sort?

O(nlogn) | |

O(n) | |

O(n ^{3}) | |

O(n ^{2}) |

**Reading comprehension Questions answers**

Question 2 Explanation:

The worst case running time for Quick sort is O(n

^{2}). In Quick sort, the worst case behaviour occurs when the partitioning routine produces two sub-arrays one with n - 1 element and other with 0 elements.

Question 3 |

Apply Quick sort on a given sequence 7 11 14 6 9 4 3 12. What is the sequence after first phase, pivot is first element?

6 4 3 7 11 9 14 12 | |

6 3 4 7 9 14 11 12 | |

7 6 14 11 9 4 3 12 | |

7 6 4 3 9 14 11 12 |

**English grammar Questions answers**

Question 3 Explanation:

Let's apply Quick sort on the given sequence,

For first phase, pivot = 7

7 11 14 6 9 4 3 12

i j

7 11 14 6 9 4 3 12

i j

7 3 14 6 9 4 11 12

i j

7 3 4 6 9 14 11 12

i j

7 3 4 6 9 14 11 12

j i

6 3 4 7 9 14 11 12

Question 4 |

The best case behaviour occurs for quick sort is, if partition splits the array of size n into .....

n/2 : (n/2) - 1 | |

n/2 : n/3 | |

n/4 : 3n/2 | |

n/4 : 3n/4 |

**Journalism Questions answers**

Question 4 Explanation:

The best case analysis of quick sort occurs when the partition splits the array into two subarrays, each of size no more than n/2 since one is of size n/2 and one of size (n/2) - 1.

Question 5 |

Quick sort is a stable sorting algorithm.

True | |

False |

**HRM Questions answers**

Question 5 Explanation:

In stable sorting algorithm the records with equal keys appear in the same order in the sorted sequence as they appear in the input unsorted sequence. Quick sort does not preserve the relative order of equal sort items. Therefore, Quick sort is not a stable sort.

There are 5 questions to complete.