Quicksort Multiple choice Questions and Answers (MCQs)

 

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Quicksort Multiple choice Questions and Answers (MCQs)

Question 1
Which of the following sorting algorithms is the fastest?
A
Merge sort
B
Quick sort
C
Insertion sort
D
Shell sort
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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.
A
True
B
False
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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?
A
O(N)
B
O(N log N)
C
O(N2)
D
O(log N)
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Question 3 Explanation: 
The worst case performance of a quick sort algorithm is mathematically found to be O(N2).

Question 4
Which of the following methods is the most effective for picking the pivot element?
A
first element
B
last element
C
median-of-three partitioning
D
random element
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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.

A
8
B
7
C
9
D
6
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Question 5 Explanation: 
Left element=8, right element=0,

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

There are 5 questions to complete.

 

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