Data Structures and Algorithms-I MCQs

Page No. 8

What is the maximum number of keys that a B+ -tree of order 3 and of height 3 have?


a3


b80


c27


d26


View Answer 26

Efficiency of finding the next record in B+ tree is ____


aO(n)


bO(log n)


cO(nlog n)


dO(1)


View Answer O(1)

Statement 1: When a node is split during insertion, the middle key is promoted to the parent as well as retained in right half-node.
Statement 2: When a key is deleted from the leaf, it is also deleted from the non-leaf nodes of the tree.


aStatement 1 is true but statement 2 is false


bStatement 2 is true but statement 1 is false


cBoth the statements are true


dBoth the statements are false



Which of the following is false?


aA B+ -tree grows downwards


bA B+ -tree is balanced


cIn a B+ -tree, the sibling pointers allow sequential searching


dB+ -tree is shallower than B-tree



A B+ tree can contain a maximum of 7 pointers in a node. What is the minimum number of keys in leaves?


a6


b3


c4


d7


View Answer 3

Which of the following is true?


aB + tree allows only the rapid random access


bB + tree allows only the rapid sequential access


cB + tree allows rapid random access as well as rapid sequential access


dB + tree allows rapid random access and slower sequential access



In a B+ tree, both the internal nodes and the leaves have keys.


aTrue


bFalse


ceither true either false


dNone of the mentioned


View Answer False

Which of the following is false?


a2-3 tree requires less storage than the BST


blookup in 2-3 tree is more efficient than in BST


c2-3 tree is shallower than BST


d2-3 tree is a balanced tree



AVL trees provide better insertion the 2-3 trees.


aTrue


bFalse


ceither true either false


dNone of the mentioned


View Answer False

Which of the following is not true about the 2-3 tree?


aall leaves are at the same level


bit is perfectly balanced


cpostorder traversal yields elements in sorted order


dit is B-tree of order 3



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