Engineering Questions with Answers - Multiple Choice Questions
Skew Heap MCQ’s
1 - Question
__________ is a self-adjusting version of a leftist heap.
a) Rightist heap
b) Skew heap
c) d-heap
d) Binary heap
View Answer
Answer: b
Explanation: A skew heap is a self-adjusting version of a leftist heap and it is simpler to implement.
2 - Question
The worst case running time of all operations in a skew heap is given as?
a) O(N)
b) O(N log N)
c) O(N2)
d) O(M log N)
View Answer
Answer: a
Explanation: The worst case running time of all operations in a skew heap is mathematically found to be O(N).
3 - Question
What is the amortized cost per operation of a skew heap?
a) O(N)
b) O(N log N)
c) O(N2)
d) O(log N)
View Answer
Answer: d
Explanation: The amortized cost per operation of a skew heap is O(log N) since the worst case analysis of skew heap is O(N) and splay tree is O(M log N).
4 - Question
The relationship of skew heaps to leftist heaps is analogous to that of?
a) Splay tree and AVL tree
b) Red black tree and AVL tree
c) Binary tree and Splay tree
d) Binary tree and Red black tree
View Answer
Answer: a
Explanation: Splay tree is a self -adjusting version of AVL tree. Similarly, skew heap is a self-adjusting version of leftist heap.
5 - Question
What is the fundamental operation performed in skew heaps?
a) intersection
b) difference
c) merging
d) sorting
View Answer
Answer: c
Explanation: The fundamental operation of skew heaps is merging. Hence, it is similar to that of a leftist heap.
6 - Question
What is the time per operation of merging, insertion and deletion operations in a skew heap?
a) O(N)
b) O(log N)
c) O(N log N)
d) O(N2)
View Answer
Answer: b
Explanation: Skew heaps support merging, insertion and deletion all effectively in O(log N) time per operation.
7 - Question
Why would a recursive implementation fail in skew heaps?
a) skew heaps are self adjusting
b) efficiency gets reduced
c) lack of stack space
d) time complexity
View Answer
Answer: c
Explanation: In skew heaps, a recursive implementation could fail because of lack of stack space even though performance is acceptable.
8 - Question
Which of the following is difficult to determine the right path length?
a) Skew heaps
b) Binomial tree
c) Leftist heap
d) d-heap
View Answer
Answer: a
Explanation: It is an open problem to determine precisely the expected right path length of both leftist and skew heaps and comparatively, the latter is difficult.
9 - Question
The worst case analysis for a naïve merge is given as?
a) O(N)
b) O( log N)
c) O( N log N)
d) O(N2)
View Answer
Answer: a
Explanation: The worst-case analysis for the naïve merge is an insertion in a right heavy tree. So, insertion takes O(N).
10 - Question
How many types of the merge are available in skew heaps?
a) 1
b) 2
c) 3
d) 4
View Answer
Answer: b
Explanation: Two kinds of the merge are available in skew heaps- naïve merge and skew merge.
11 - Question
Naïve merge cannot be done in a skew merge.
a) true
b) false
View Answer
Answer: b
Explanation: One way of doing skew merge is to begin with naïve merge and then swapping the left and right children of the tree.
12 - Question
What is the amortized efficiency of skew merge?
a) O(N)
b) O( log N)
c) O( N log N)
d) O(N2)
View Answer
Answer: b
Explanation: The amortized efficiency of a skew heap is mathematically found to be O( log N).
13 - Question
In skew heaps, certain constraints are to be met in order to perform swapping.
a) true
b) false
View Answer
Answer: b
Explanation: In skew heaps, swaps are unconditional. It is done with the exception that the largest of all nodes does not have its children swapped.