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Database Management System

21.

For using a specific database command is used.

Answer: A

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22.

The data in the database at a particular moment of time is called the _______

Answer: A

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23.

Drop Table cannot be used to drop a table referenced by a ______ constraint.

Answer: C

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24.

If two relations R and S are joined, then the non matching tuples of both R and S are ignored in

Answer: D

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25.

If an entity can belong to only one lower level entity then the constraint is

Answer: B

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26.

The cost of reading and writing temporary files while evaluating a query can be reduced by

Answer: B

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27.

Which of the following concurrency control schemes is not based on the serializability property?

Answer: D

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28.

The common column is eliminated in

Answer: C

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29.

The middleware databases in which the business rules act are applicable to _______ tier architectures

Answer: B

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Answer: D

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