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## Quicksort Multiple choice Questions and Answers (MCQs)

Question 1 |

Which of the following sorting algorithms is the fastest?

Merge sort | |

Quick sort | |

Insertion sort | |

Shell sort |

**Journalism Questions answers**

Question 1 Explanation:

Quick sort is the fastest known sorting algorithm because of its highly optimized inner loop.

Question 2 |

Quick sort follows Divide-and-Conquer strategy.

True | |

False |

**Management Questions answers**

Question 2 Explanation:

In quick sort, the array is divided into sub-arrays and then it is sorted (divide-and-conquer strategy).

Question 3 |

What is the worst case time complexity of a quick sort algorithm?

O(N) | |

O(N log N) | |

O(N ^{2}) | |

O(log N) |

**Reading comprehension Questions answers**

Question 3 Explanation:

The worst case performance of a quick sort algorithm is mathematically found to be O(N

^{2}).

Question 4 |

Which of the following methods is the most effective for picking the pivot element?

first element | |

last element | |

median-of-three partitioning | |

random element |

**Management Questions answers**

Question 4 Explanation:

Median-of-three partitioning is the best method for choosing an appropriate pivot element. Picking a first, last or random element as a pivot is not much effective.

Question 5 |

Find the pivot element from the given input using median-of-three partitioning method.

8, 1, 4, 9, 6, 3, 5, 2, 7, 0.

8 | |

7 | |

9 | |

6 |

**Sociology Questions answers**

Question 5 Explanation:

Left element=8, right element=0,

Centre=[position(left+right)/2]=6.

There are 5 questions to complete.