Database Management Systems Mcqs

Page No. 23

A dependency exist between two columns when


aTogether they constitute a composite key for the table

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

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cThe table is in 3NF

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dTogether they constitute a foreign key

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


aAutonumber

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bBoolean

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cSequential key

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dSequential number

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View Answer Autonumber

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


aData dictionary

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bdata repository

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cIndex data

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dMetadata

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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

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bBCNF

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cFourth

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dThird

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View Answer BCNF

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


aFirst normal form

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bSecond normal form

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cThird form

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dFourth normal form

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View Answer Second normal form

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


a1 NF

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b2 NF

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c3 NF

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dAll of the mentioned

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View Answer All of the mentioned

Which one is based on multi-valued dependency:


aFirst

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bSecond

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cThird

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dFourth

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View Answer Fourth

Identify the composite attributes


aSalary

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bCredits

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cSection_id

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dNone of the mentioned

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View Answer None of the mentioned

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


aAtomic

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bSubatomic

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cSubstructure

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dSubset

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View Answer Atomic

The descriptive property possessed by each entity set is _________


aEntity

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bAttribute

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cRelation

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dModel

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View Answer Attribute

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