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MCQ

Q.

Two files may be joined into a third file if

A

they have a row in common

B

they have a field in common

C

they have no records with the same value in the common field

D

both (b) and (c)

E

None of the above

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1.

Data encryption techniques are particularly useful for

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reducing storage space requirements

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improving data integrity

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protecting data in data communication systems

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A _____ means that one record in a particular record type is related to only one record of another record type.

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None of the above

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a Rolodex card file

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a business form

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All of the above

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None of the above

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In SQL, which command(s) is(are) used to enable/disable all triggers on a table?

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ALTER TRIGGERS

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MODIFY TRIGGERS IN TABLE

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All of the above

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