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Introduction to Database System

Introduction to Database System
Structured Query Language (SQL) is an internationally recognized standard language that is understood by all commercial database management system products.

True
False

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Introduction to Database System
To have a file hold a list, it is necessary to

decide which fields will be used as sort or index keys
identify the name, width and type of the fields of each record.
All of the listed here
identify the records in the list

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Introduction to Database System
Which type of entity cannot exist in the database unless another type of entity also exists in the database, but does not require that the identifier of that other entity be included as part of its own identifier?

Strong entity
ID-dependent entity
ID- independent entity
Weak entity

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Introduction to Database System
An ID-dependent entity is an entity whose identifier is a composite identifier where no portion of the composite identifier is an identifier of another entity.

False
True

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Introduction to Database System
When you have finished entering information into a form

All of the listed here
the contents of the form are written to the data file
the template is written to the data file
the contents of the form can be printed

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Introduction to Database System
One of the reasons why OODBMSs have not been widely used for business information systems is that OOP is obsolete.

True
False

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