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Quicksort Multiple choice Questions and Answers (MCQs)
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Question 6 [CLICK ON ANY CHOICE TO KNOW MCQ multiple objective type questions RIGHT ANSWER] |
Which is the safest method to choose a pivot element?
choosing a random element as pivot | |
choosing the first element as pivot | |
choosing the last element as pivot | |
median-of-three partitioning method |
Question 6 Explanation:
This is the safest method to choose the pivot element since it is very unlikely that a random pivot would consistently provide a poor partition.
Question 7 [CLICK ON ANY CHOICE TO KNOW MCQ multiple objective type questions RIGHT ANSWER] |
What is the average running time of a quick sort algorithm?
O(N2) | |
O(N) | |
O(N log N) | |
O(log N) |
Question 7 Explanation:
The best case and average case analysis of a quick sort algorithm are mathematically found to be O(N log N).
Question 8 [CLICK ON ANY CHOICE TO KNOW MCQ multiple objective type questions RIGHT ANSWER] |
Which of the following sorting algorithms is used along with quick sort to sort the sub arrays?
Merge sort | |
Shell sort | |
Insertion sort | |
Bubble sort |
Question 8 Explanation:
Insertion sort is used along with quick sort to sort the sub arrays.
It is used only at the end.
Question 9 [CLICK ON ANY CHOICE TO KNOW MCQ multiple objective type questions RIGHT ANSWER] |
Quick sort uses join operation rather than merge operation.
true | |
false |
Question 9 Explanation:
Quick sort uses join operation since join is a faster operation than merge.
Question 10 [CLICK ON ANY CHOICE TO KNOW MCQ multiple objective type questions RIGHT ANSWER] |
How many sub arrays does the quick sort algorithm divide the entire array into?
one | |
two | |
three | |
four |
Question 10 Explanation:
The entire array is divided into two partitions, 1st sub array containing elements less than the pivot element and 2nd sub array containing elements greater than the pivot element.
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