Relational Database Management System Mcqs

Page No. 34

Some buckets are assigned more records than the others which causes bucket overflow, this condition is called as ________


aBucket sufficiency


bBucket insufficiency


cBucket skew


dBucket normalcy


View Answer Bucket skew

What is a bucket overflow?


a When a bucket does not have enough space


b There are insufficient buckets


cWhen Bucket skew occurs


dAll of the mentioned


View Answer All of the mentioned

In a __________ we organize the search keys, with their associated pointers, into a hash file structure


aHash file organization


bHash index organization


cHashing address


dNone of the mentioned



In a __________ , we obtain the address of the disk block containing a desired record directly by computing a function on the search key value of the record


aHash file organization


b Hash index organization


cHashing address


dNone of the mentioned



If K denotes the set of all the search key values, and B denotes the set of all bucket addresses, a function from K to B is called as __________


a Bucket function


b Address function


cHash function


d Search function


View Answer Hash function

The term ______ is used to denote a unit of storage that can store one or more records


aBasket


bBucket


cUnit


dSet


View Answer Bucket

Which of the following hash function classifies data into the highest number of buckets ?


a Sum of digits modulo 8


b Sum of digits modulo 5


cSum of digits modulo 2


d Sum of digits


View Answer Sum of digits

Which of the following hash function classifies data into least number of buckets?


a Sum of digits modulo 8


bSum of digits modulo 5


cSum of digits modulo 2


dSum of digits



Which of the following is an issue that needs to be considered while choosing an indexing technique?


aFrequency of insertion and deletion


b Data types of the data


cNumber of items in the relation


dNone of the mentioned



Hash structures are not the best choice for which of the following?


a A search key on which individual point queries are likely


bA search key which is invalid


c A search key on which range queries are likely


dA search key on which multi-level queries are likely



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