Data Structures and Algorithms-I MCQs

Page No. 42

Hash tree is used in effective data verification in distributed systems.


aTrue


bFalse


cNone of the given options


deither true either false


View Answer True

Hash tree is generalization of ______


aHeap


bHash list


cBST


dB – tree


View Answer Hash list

Did Google conduct a large evaluation for comparing the performance by two technique MinHash and SimHash.


aTrue


bFalse


cNone of the given options


deither true either false


View Answer True

Is MinHash used as a tool for association rule learning.


aTrue


bFalse


cNone of the given options


deither true either false


View Answer True

How many bits are needed to specify the single permutation by min-wise independent family?


aO (log n!)


bO (n!)


cΩ (n2)


dΩ (n2)


View Answer Ω (n)

What is the time required for single variant hashing to maintain the minimum hash queue?


aO (log n!)


bO (n!)


cO (n2)


dO (n)


View Answer O (n)

What is the expected error by the estimator Chernoff bound on the samples performed without replacement?


aO (log k!)


bO (k!)


cO (k2)


dO (1/k½)


View Answer O (1/k½)

How many hashes will be needed for calculating Jaccard index with an expected error less than or equal to 0.05?


a100


b200


c300


d400


View Answer 400

What is the expected error for estimating the Jaccard index using MinHash scheme for k different hash functions?


aO (log k!)


bO (k!)


cO (k2)


dO (1/k½)


View Answer O (1/k½)

When are the members of two sets more common relatively?


aJaccard Index is Closer to 1


bJaccard Index is Closer to 0


cJaccard Index is Closer to -1


dJaccard Index is Farther to 1



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