超星 - chapter 3 Data and Knowledge Management 单元测试

单选题

Which of the following is NOT a reason managing data is difficult.

A. Data are generated from multiple sources.
B. Data are scattered throughout organizations.
C. Data are subject to data rot.
D. The amount of data is decreasing exponentially with time.

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单选题

Data ________ refers primarily to problems with the media on which the data are stored.

A. clickstreaming
B. degradation
C. scattering
D. rot

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单选题

From the mid-1950s until the early 1970s, organizations managed their data in a _; this created .

A. database; a centralized location for information
B. database; information silos
C. file management environment; a centralized location for information
D. file management environment; information silos

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单选题

Databases maximize _; this means .

A. independence; applications cannot access data associated with other applications
B. independence; applications and data are not linked to each other, so all applications are able to access the same data
C. isolation; applications cannot access data associated with other applications
D. isolation; applications and data are not linked to each other, so all applications are able to access the same data

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单选题

Each relational database table contains records (listed in _) and attributes (listed in ) .

A. columns; columns
B. columns; rows
C. rows; columns
D. rows; rows

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单选题

Each characteristic or quality of a particular entity is called a(n) ________.

A. attribute
B. field
C. instance
D. record

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单选题

The category “student” is a(n) ________.

A. attribute
B. database
C. entity
D. instance

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单选题

The ________ key is an identifier field that uniquely identifies a record.

A. alien
B. foreign
C. primary
D. secondary

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单选题

Considering the following tables, ________ is a primary key. Student Table Professor Table Class Table SID Name Expected Graduation Year PID Name Tenure Year ID Name PID 123 Smith 2017 ABC Jones 1995 MGT101 Intro to Management ABC 234 Jones 2018 DEF Brilliant 2000 BUS101 Intro to Business ABC 567 Barilla 2018 GHI Genius 2000 MGT201 Intermediate Management GHI

A. Class Table: PID
B. Professor Table: Name
C. Student Table: Expected Graduation Year
D. Student Table: ID

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单选题

A data ________ is a repository of historical data that are organized by subject to support decision makers in the organization.

A. mart
B. shop
C. store
D. warehouse

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Which of the following is NOT a reason managing data is difficult.

Data ________ refers primarily to problems with the media on which the data are stored.

From the mid-1950s until the early 1970s, organizations managed their data in a _________; this created ________.

Databases maximize _________; this means ________.

Each relational database table contains records (listed in _______) and attributes (listed in ______) .

Each characteristic or quality of a particular entity is called a(n) ________.

The category “student” is a(n) ________.

The ________ key is an identifier field that uniquely identifies a record.

A data ________ is a repository of historical data that are organized by subject to support decision makers in the organization.

From the mid-1950s until the early 1970s, organizations managed their data in a _; this created .

Databases maximize _; this means .

Each relational database table contains records (listed in _) and attributes (listed in ) .