3-45.
3-46.
3-47.
3-48.
3-49.
A conventional computer
system has few application
programs or systems using
different databases and
files.
1.
True
2.
False
Which of the following
defines a DBMS schema?
1.
The actual data in the
database framework
2.
The software description
of the operating system
3.
An overall logical
database description or
framework
4.
A data aggregate of
owner-type records
Which of the following items
enhances security factors
and helps prohibit data
compromise?
1.
A schema
2.
A subschema
3.
A subroutine
4.
A data converter
All data provided by the
DBMS in response to a CALL
for data is delivered to
what is conceptually a
loading and unloading zone
called a
1.
system buffer
2.
I/O control area
3.
user working area
4.
DBMS waiting buffer
A data item can be described
as an occurrence of which of
the following elements?
1.
A bit in a database
2.
The largest unit of
named data
3.
The smallest unit of
named data
4.
A byte in a database
3-50.
A data aggregate is an
occurrence of a named
collection of data items
within a
1.
byte
2.
file
3.
record
4.
system
3-51.
A vector is which of the
following (a) sequences of
data items that have which
of the following
(b) characteristics?
1.
(a)
One-dimensional
(b) different
2.
(a)
One-dimensional
(b)
identical
3.
(a)
Two-dimensional
(b) different
4.
(a)
Two-dimensional
(b)
identical
3-52.
Which of the following is a
unique value that identifies
a record in the database to
a run unit?
1.
A sort key
2.
A search key
3.
An actual key
4.
A database key
3-53.
An occurrence of a named
collection of records is
called a
1.
key
2.
set
3.
mark
4.
keyword
3-54.
Each set occurrence must
contain what minimum number
of occurrences if it is
defined as an owner type of
record?
1.
One
2.
Two
3.
Three
4.
Four
2
4
