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Introduction to Database System

Introduction to Database System
Which language has recently become the de-facto standard for interfacing application programs with relational database system?

4GL
None of these
Oracle
dBASE
SQL

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Introduction to Database System
A data dictionary is a special file that contains

None of these
the names of all fields in all files
All of these
the data types of all fields in all files
the widths of all fields in all files

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Introduction to Database System
A list consists of last names, first names, addresses, and pin codes if all people in the list have the same last and the same pin code, a useful key would be

None of these
All of these
the last name
a compound key consisting of the first name and the last name
the pin code

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Introduction to Database System
In a one-to-many relationship, the entity that is on the one side of the relationship is called a(n) ________ entity.

parent
child
subtype
instance

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Introduction to Database System
Which of the following is a serious problem of file management systems?

program dependence
lack of data independence
difficult to update
All of these
data redundancy

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Introduction to Database System
A number of related records that are treated as a unit is called

batch
data
field
file

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