Engineering Questions with Answers - Multiple Choice Questions

Data Structure MCQ – Weak Heap

1 - Question

Choose the correct properties of weak-heap.
a) Every node has value greater than the value of child node
b) Every right child of node has greater value than parent node
c) Every left child of node has greater value than parent node
d) Every left and right child of node has same value as parent node

View Answer

Answer: b
Explanation: This is the property of a weak heap.




2 - Question

Left child of parent node has value lesser than the parent node.
a) True
b) False

View Answer

Answer: b
Explanation: Weak heap has no left child.




3 - Question

What is the other name of weak heap?
a) Min-heap
b) Max-heap
c) Relaxed -heap
d) Leonardo heap

View Answer

Answer: c
Explanation: Relaxed heap is just another name of weak heap.




4 - Question

What is the worst case time in searching minimum value in weak -heap?
a) O(log n)
b) O(n)
c) O(n logn)
d) O(1)

View Answer

Answer: d
Explanation: Weak heap is an array based form that supports the operation of finding a minimum in O(1).




5 - Question

 The total comparisons in finding both smallest and largest elements are
a) 2*n +2
b) n + ((n+1)/2) -2
c) n+logn
d) n2

View Answer

Answer: b
Explanation: The total comparisons in finding smallest and largest elements is n + ((n+1)/2) – 2.




6 - Question

What is the complexity of given function of insertion.

	insert(int n)
{
if(buffer_size()< maxi_biffer_size())
		buffer_aar[ind]==n;
else
		move_to_heap(buffer,buffer+maxi_buffer_size())
}

a) O(logn)
b) amortized O(1)
c) O(n)
d) O (n*logn)

View Answer

Answer: b
Explanation: Use a buffer array to store a fixed number of elements when the buffer is full the content of buffer is moved to heap.As a result the complexity
is amotized O(1).




7 - Question

Does there exist a heap with seven distinct elements so that the Inorder traversal gives the element in sorted order.
a) Yes
b) No

View Answer

Answer: b
Explanation: No, The inorder traversal will not give elements in sorted order. As heap is implemented as either min-heap or max-heap, the root will be have highest or lowest value than remaining values of the nodes. So this traversal will not give a sorted list.




8 - Question

The leaf node for a heap of height h will be at which position.
a) h
b) h-1
c) h or h-1
d) h-2

View Answer

Answer: c
Explanation: A complete binary tree is also a heap so by the property of binary tree the leaf nodes will be must at height h or h-1.

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