Data Structures Algorithms-II MCQs

Page No. 20

Introsort algorithm is combination of _____________


aQuick sort and Heap sort


bQuick sort and Shell sort


cHeap sort and Merge sort


dHeap sort and insertion sort



Which one of the following is a variation of Heap sort?


aComb sort


b Smooth sort


cBinary tree sort


dShell sort


View Answer Smooth sort

In average case Heap sort is as efficient as the Quick sort.


aTrue


bFalse


cA & B


dNone of these


View Answer False

The descending heap property is ___________


aA[Parent(i)] = A[i]


bA[Parent(i)] <= A[i]


cA[Parent(i)] >= A[i]


dA[Parent(i)] > 2 * A[i]


View Answer A[Parent(i)] >= A[i]

The essential part of Heap sort is construction of max-heap. Consider the tree shown below, the node 24 violates the max-heap property. Once heapify procedure is applied to it, which position will it be in


a4


b 5


c8


d 9


View Answer 9

Which one of the following is false?


aHeap sort is an in-place algorithm


bHeap sort has O(nlogn) average case time complexity


cHeap sort is stable sort


dHeap sort is a comparison-based sorting algorithm



Heap sort is an implementation of ____________ using a descending priority queue.


ainsertion sort


bselection sort


c bubble sort


dmerge sort


View Answer selection sort

Which of the following sorting algorithm will be preferred when the size of partition is between 16 and 2 log(n) while implementing introsort?


aquick sort


binsertion sort


cheap sort


dmerge sort


View Answer quick sort

What is the cut-off for switching from quick sort to insertion sort in the implementation of introsort?


a4


b8


c16


d16


View Answer 16

Why is insertion sort preferred over other sorting algorithms (like selection sort, bubble sort etc.) for introsort implementation?


aBecause insertion sort is faster and adaptive


bBecause insertion sort requires less space


cBecause insertion sort is easy to implement


d Because insertion sort is easy to understand



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