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

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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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