Relational Database Management System Mcqs

Page No. 36

State true or false: Bitmaps can be combined with B+ trees


a True


bfalse


ceither of true false


dnone of these


View Answer True

The complement operation in bitmaps is done by using


aLogical AND


bLogical OR


cLogical NOT


dLogical NOR


View Answer Logical NOT

What does an existence bitmap do?


aIt recognizes deleted records


bIt inserts values into empty bitmaps


c It makes sure that no records are deleted


dNone of the mentioned



Intersection of the bitmaps is done by


aLogical AND


bLogical OR


cLogical NOT


dLogical NOR


View Answer Logical AND

A bitmap is _______


aAn array of bits


bAn index of bits


cA function mapping all the bits of data


dNone of the mentioned


View Answer An array of bits

Which of the following can be implemented?


aConjunctive selection using one index


bConjunctive selection using composite index


cConjunctive selection by intersection of identifiers


d All of the mentioned



A selection of the form giving all the records not satisfying simple individual conditions is ______


a Conjunctive selection


b Disjunctive selection


cNegation


dNone of the mentioned


View Answer Negation

A selection of the form satisfying the union of all records satisfying individual simple conditions is


aConjunctive selection


b Disjunctive selection


cNegation


dNone of the mentioned



A selection of the form satisfying the intersection of all records satisfying individual simple conditions is


aConjunctive selection


bDisjunctive selection


cNegation


dNone of the mentioned


View Answer Conjunctive selection

Sorting of relations that do not fit in memory is called as _______


aInternal sorting


bExternal sorting


cOverflow sorting


dOverload sorting


View Answer External sorting

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