Database Management Systems Mcqs

Page No. 23

A dependency exist between two columns when


aTogether they constitute a composite key for the table


bKnowing the value in one column determines the value stored in another column


cThe table is in 3NF


dTogether they constitute a foreign key



A data type that creates unique numbers for key columns in Microsoft Access is:


aAutonumber


bBoolean


cSequential key


dSequential number


View Answer Autonumber

The term for information that describes what type of data is available in a database is:


aData dictionary


bdata repository


cIndex data


dMetadata


View Answer Metadata

If an attribute of a composite key is dependent on an attribute of the other composite key, a normalization called _____ is needed.


aDKNF


bBCNF


cFourth


dThird


View Answer BCNF

If every non-key attribute is functionally dependent primary key, then the relation will be in


aFirst normal form


bSecond normal form


cThird form


dFourth normal form


View Answer Second normal form

If a relation is in BCNF, then it is also in


a1 NF


b2 NF


c3 NF


dAll of the mentioned


View Answer All of the mentioned

Which one is based on multi-valued dependency:


aFirst


bSecond


cThird


dFourth


View Answer Fourth

Identify the composite attributes


aSalary


bCredits


cSection_id


dNone of the mentioned


View Answer None of the mentioned

A domain is ______ if elements of the domain are considered to be indivisible units.


aAtomic


bSubatomic


cSubstructure


dSubset


View Answer Atomic

The descriptive property possessed by each entity set is _________


aEntity


bAttribute


cRelation


dModel


View Answer Attribute

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