Database Management Systems Mcqs

Page No. 57

Optimization that is basically related to the rewriter module is termed as__________


aSemantic query optimization

✓


bGlobal query optimization

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cAll of the Mentioned

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dNone of the Mentioned

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Which is the duplication of computer operations and routine backups to combat any unforeseen problems:


aConcurrency

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bDeadlock

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cBackup

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dRecovery

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View Answer Recovery

Which is a duplicate copy of a file program that is stored on a different storage media than the original location:


aConcurrency

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bDeadlock

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cBackup

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dRecovery

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View Answer Backup

Which is refers to a stalemate situation due to which no further progress is possible as computer await response of each other:


aConcurrency

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bDeadlock

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cBackup

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dRecovery

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View Answer Deadlock

Which formal method that locates and analyses relation schemas on the basis of their primary, candidate keys, and the FD’s that are present among the attributes of these schemas:


aFunctional dependency

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bDatabase modeling

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cNormalization

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dDecomposition

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View Answer Normalization

Which is the process of breaking a relation into multiple relations:


aFunctional dependency

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bDatabase modeling

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cNormalization

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dDecomposition

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View Answer Decomposition

Which is a bottom-up approach to database design that design by examining the relationship between attributes:


aFunctional dependency

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bDatabase modeling

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cNormalization

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dDecomposition

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View Answer Normalization

E.F.Codd developed the normalization process in the which early:


a1969

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b1970

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c1971

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d1972

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View Answer 1970

Who developed the normalization process:


aE.F. codd

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bF.F. codd

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cE.E. codd

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dNone of the mentioned

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View Answer E.F. codd

How many types of insertion anomalies:


a1

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b2

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c3

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d4

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View Answer 2

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