SAD- Quiz 5
Terms in this set (45)
A black hole is a process that has ____.
A data dictionary specifies a data element's ____, which is the set of values permitted for the data element.
A data ____ is a central storehouse of information about a system's data.
A decision ____ is a graphical representation of the conditions, actions, and rules found in a decision table.
A DFD shows ____.
how a system transforms input data into useful information
A gray hole is a process that has ____.
at least one input and one output, but the input obviously is insufficient to generate the output shown
A spontaneous generation process is a process that has ____.
A ____ description documents the details of a functional primitive, which represents a specific set of processing steps and business logic.
A ____ table shows a logical structure, with all possible combinations of conditions and resulting actions.
An auto parts store inventory record might include ____.
minimum stock levels
ensures that the input and output data flows of the parent DFD are maintained on the child DFD
Because diagram 0 is a(n) ____ version of process 0, it shows considerably more detail than a context diagram.
Decision trees show the logic structure in a ____.
horizontal form that resembles a tree with the roots at the left and the branches to the right
DFD symbols are referenced by using all ____ letters for the symbol name.
If processes must be performed in a specific sequence, you document the information in the ____.
In a data dictionary, a(n) ____ is the smallest piece of data that has meaning within an information system.
In a data dictionary, any name other than the standard data element name is called a(n) ____.
In a data dictionary, data elements are combined into ____, which are meaningful combinations of data elements that are included in data flows or retained in data stores.
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.
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.
In a data dictionary, ____ refers to whether the data element contains numeric, alphabetic, or character values.
In a DFD, the Gane and Sarson symbol for a data flow is a ____.
line with a single or double arrowhead
In a DFD, the Gane and Sarson symbol for a data store is a ____.
flat rectangle that is open on the right side and closed on the left side
In a DFD, the Gane and Sarson symbol for a process is a ____.
rectangle with rounded corners
In a DFD, the Gane and Sarson symbol for an entity is a ____.
rectangle, which may be shaded to make it look three-dimensional
In data and process modeling, a(n) ____ model shows what the system must do, regardless of how it will be implemented physically.
In the accompanying figure, the sequence structure is the completion of ____.
steps in a chronological order, one after another
Leveling also is called ____.
uses a series of increasingly detailed DFDs to describe an information system
Many valuable reports can be obtained from a data dictionary, including a(n) ____.
alphabetized list of all data elements by name
report by user departments of data elements that must be updated by each department
report of all data flows that use a particular data element
detailed report showing all characteristics of data elements
Structured English might look familiar to programming students because it resembles ____, which is used in program design.
The data dictionary usually records and describes a default value, which is the ____.
value for the data element if a value otherwise is not entered for it
The disadvantage of the four-model approach is ____.
the added time and cost needed to develop a logical and physical model of the current system
The iteration structure is the completion of ____.
a process step that is repeated until a specific condition changes
The major benefit of ____ is that it gives a clear picture of current system functions before any modifications or improvements are made.
the four-model approach
The selection structure is the completion of ____.
one or more process steps based on the results of a test or condition
Typical process description tools include ____.
Using ____, an analyst starts with an overall view, which is a context diagram with a single process symbol, and then the analyst creates diagram 0, which shows more detail.
When DFDs are drawn, which of the following conventions should be followed?
each context diagram must fit on one page
do not cross lines
use a unique reference number for each process symbol
When structured English is used, which of the following rules must be conformed to?
use only the three building blocks of sequence, selection, and iteration
use indentation for readability
use a limited vocabulary
____ also is called looping.
____ is based on combinations of the three logical structures, or control structures (one of which is shown in the accompanying figure), which serve as building blocks for the process.
____ is the process of drawing a series of increasingly detailed DFDs, until all functional primitives are identified.
____ is/are logically impossible in a DFD because a process must act on input, shown by an incoming data flow, and produce output, represented by an outgoing data flow.
____ maintains consistency among DFDs by ensuring that input and output data flows align properly.