Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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In data and process modeling, a(n) ____ model shows what the system must do,
regardless of how it will be implemented physically.
a. | operational | c. | logical | b. | physical | d. | relational |
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2.
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A DFD shows ____.
a. | what the system does | b. | how data moves through an information
system | c. | how a system transforms input data into useful information | d. | all of the
above |
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3.
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A black hole process is a process that has ____.
a. | no input | b. | at least one output and one input, but the
output obviously is insufficient to generate the input shown | c. | no
output | d. | at least one input and one output, but the input obviously is insufficient to
generate the output shown |
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4.
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A gray hole process is a process that has ____.
a. | no input | b. | at least one output and one input, but the
output obviously is insufficient to generate the input shown | c. | no
output | d. | at least one input and one output, but the input obviously is insufficient to
generate the output shown |
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5.
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Because diagram 0 is a(n) ____ version of process 0, it shows considerably more
detail than a context diagram.
a. | contracted | c. | condensed | b. | exploded | d. | extrapolated |
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6.
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____ is the process of drawing a series of increasingly detailed DFDs, until all
functional primitives are identified.
a. | Leveling | c. | Indexing | b. | Balancing | d. | Exploding |
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7.
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A data ____ is a central storehouse of information about a system’s
data.
a. | glossary | c. | content bank | b. | knowledgebase | d. | repository |
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8.
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In a data dictionary, a(n) ____ is the smallest piece of data that has meaning
within an information system.
a. | field | c. | record | b. | index | d. | pixel |
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9.
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In a data dictionary, any name other than the standard data element name is
called a(n) ____.
a. | clone | c. | alias | b. | cipher | d. | index |
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10.
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In a data dictionary, ____ refers to whether the data element contains numeric,
alphabetic, or character values.
a. | value | c. | valence | b. | type | d. | domain |
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11.
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In a data dictionary, ____ is the maximum number of characters for an alphabetic
or character data element or the maximum number of digits and number of decimal positions for a
numeric data element.
a. | domain | c. | length | b. | valence | d. | index |
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12.
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In a data dictionary, some data elements have ____ rules, such as an
employee’s salary must be within the range defined for the employee’s job
classification.
a. | domain | c. | validity | b. | range | d. | mastered |
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13.
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Typical process description tools include all of the following EXCEPT
____.
a. | context diagrams | c. | structured English | b. | decision trees | d. | decision tables |
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14.
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The iteration structure is the completion of ____.
a. | one or more process steps based on the results of a test or
condition | b. | steps in a chronological order, one after another | c. | a process step that
is repeated until a specific condition changes | d. | a specific condition that is repeated until a
process changes |
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15.
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Structured English might look familiar to programming students because it
resembles ____, which is used in program design.
a. | pseudocode | c. | iterative code | b. | a decision tree | d. | decision code |
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16.
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A(n) ____ table shows a logical structure, with all possible combinations of
conditions and resulting actions.
a. | pseudo | c. | decision | b. | logic | d. | validity |
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True/False
Indicate whether the
statement is true or false.
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17.
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In a DFD, processes contain the business logic, also called business rules, that
transform the data and produce the required results.
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18.
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A DFD shows the structure and detailed contents of a data flow.
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19.
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In a DFD, a process symbol can have only one outgoing data flow.
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20.
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In a DFD, a data flow must have a process symbol on at least one
end.
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21.
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Systems analysts call an entity that receives data from the system a
source.
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22.
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Data stores are shown in a context diagram because data stores are external to
the system.
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23.
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Deciding whether to explode a process further or determine that it is a
functional primitive is a matter of experience, judgment, and interaction with programmers who must
translate the logical design into code.
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24.
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When a DFD is exploded, the higher-level diagram is called the child diagram,
and the lower-level diagram is referred to as the parent diagram.
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25.
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DFDs are balanced if each internal process is numbered to show that it is a
child of the parent process.
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26.
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In most data dictionaries, records are defined together with the data flows and
data stores.
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27.
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In addition to describing each data element, data flow, data store, record,
entity, and process, the data dictionary documents the relationships among these components.
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28.
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In modular design, each logical structure must have multiple entry and exit
points.
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29.
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Whether to use a decision table or a decision tree often is a matter of personal
preference.
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30.
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During the systems design phase, a physical model of the new information system
is created that follows from the logical model and involves operational tasks and techniques.
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Completion
Complete each
statement.
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31.
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Analysts use ____________________ modeling techniques to show how a system
transforms data into useful information.
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32.
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In a typical company, ____________________ might include calculating sales
trends, filing online insurance claims, ordering inventory from a supplier’s system, or
verifying e-mail addresses for Web customers.
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33.
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The first step in constructing a set of DFDs is to draw a(n)
____________________, which is a top-level view of an information system that shows the
system’s boundaries and scope.
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34.
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To draw a context diagram, you start by placing a single process symbol in the
center of the page, which you identify as ____________________.
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35.
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To show the detail inside a black box, create DFD ____________________, which
zooms in on the system and shows major processes, data flows, and data stores.
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Matching
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Identify the letter of the choice that best matches the phrase or
definition. a. | balancing | f. | data dictionary | b. | structured
analysis | g. | decision
table | c. | leveling | h. | logical | d. | DFD | i. | data flow | e. | physical | j. | record |
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36.
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Model that describes how a system will be constructed.
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37.
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Model that shows what the system must do, regardless of how it will be
implemented.
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38.
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Shows how a system transforms input data into useful information.
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39.
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DFD component that represents one or more data items.
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40.
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A data structure that contains a set of related data elements that are stored
and processed together.
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41.
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Ensures that the input and output data flows of the parent DFD are maintained
on the child DFD.
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42.
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With this, an analyst starts with an overall view, which is a context diagram
with a single process symbol.
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43.
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In addition to documenting each data element, all data flows must be documented
here.
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44.
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A set of DFDs produces a logical model of the system, but the details within
those DFDs are documented separately in a data dictionary, which is the second component of
this.
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45.
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In addition to multiple conditions, this can have more than two possible
outcomes.
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