Exercise: Database Systems

Questions for: Database Systems

In order to use a record management system
A:
You need to understand the low-level details of how information in stored
B:
You need to understand the model the record management system uses.
C:
Both (a) and (b)
D:
All of the above
Answer: B
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Queries to a database
A:
are written in English
B:
can use aggregate functions like SUM and COUNT
C:
both (a) and (b)
D:
All of the above
Answer: B
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A logical schema
A:
is the entire database
B:
is a standard way of organizing information into accessible parts
C:
describes how data is actually stored on disk
D:
All of the above
Answer: B
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It is more accurate to define a _____ as a variety of different record types that are treated as a single unit
A:
Database
B:
Table
C:
Record
D:
Flat File
Answer: A
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Data encryption techniques are particularly useful for
A:
reducing storage space requirements
B:
improving data integrity
C:
protecting data in data communication systems
D:
All of the above
Answer: C
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