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Organising Data

Which sorting...

Question

Which sorting algorithm fastest?

A

Selection sort

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B

Bubble sort

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C

Quick sort

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D

Heap Sort

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Solution

The correct option is A Selection sort
Selection sorting algorithm fastest.

The selection sort is a combination of searching and sorting. During each pass, the unsorted element with the smallest (or largest) value is moved to its proper position in the array. The number of times the sort passes through the array is one less than the number of items in the array.

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Q. Which of the following sorting algorithms are stable?

I. Insertion sort II. Bubble sort
III. Merge sort IV. Heap sort

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smallest element is selected as pivot using an 0( n) time algorithm. What is the worst case time complexity of the quick sort?

Q. Consider a new sorting algorithm similar to the bubble sort algorithm, called Rumble Sort. Given an array as input, Rumble Sort attempts to sort the array and produces a sorted array as output. Here' s the pseudocode for RumbleSort (L).

Rumblesort(L):
let sorted = false
while not sorted:
sorted = true
for i = 0; i < len (L) - 2; i + + ;
if L(i) > L [i + 2];
sorted = false
reverse the given list from L(i) to L [i + 2] (unclusive).

Consider running RumblesSort on the following inputs.
(i) [5 6 8 4 3]
(ii) [5 6 4 8 3]
(iii) [3 4 8 6 5]
(iv) [5 4 8 6 3 ]

For how many of the inputs, does RumbleSort produce the correct sorted array?

Q. A list of n strings, each of length n, is sorted into lexicographic order using the merge sort algorithm. The worst case running time of this computation is

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