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.
查看答案
Data ________ refers primarily to problems with the media on which the data are stored.
A. clickstreaming
B. degradation
C. scattering
D. rot
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
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
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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