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Introduction to Database System

Introduction to Database System
Data security threats include

hardware failure
all of the listed here
privacy invasion
fraudulent manipulation of data

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Introduction to Database System
A maximum cardinality is the maximum number of entity instances that can participate in a relationship instance.

True
False

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Introduction to Database System
A scheme describes

data elements
None of these
records and files
All of these
record relationships

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Introduction to Database System
Prior to 1970, all data was stored in separate files, which were mostly stored on reels of magnetic tape.

False
True

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Introduction to Database System
A tuple is a(n):

key of a table.
row of a table.
column of a table.
two dimensional table.

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Introduction to Database System
After you _____ a record, many data management the environments require you to issue a command to save the changes you made.

Delete
Index
Update
Sort key

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