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50 Cards in this Set
- Front
- Back
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alias |
Any name(s) other than the standard data element name
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attributes
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Standard DFD names that enter or leave a data store
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balancing
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Maintains consistency among a set of DFDs
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black box
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A process symbol in a data flow diagram
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black hole
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Process that has input, but produces no output data flow
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business logic
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Transforms data and produces required results
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child diagram
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The lower-level diagram on a DFD that has been exploded
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context diagram
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Top-level view of an information system that shows its boundaries and scope
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data dictionary
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A central storehouse of documentation for an information system
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data element
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Smallest piece of data that has meaning within an information system
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data flow
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Path for data to move from one part of an information system to another
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data flow diagram (DFD)
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Uses symbols to show how a system transforms input data into useful information
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data flow label
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The data flow name as it appears on the DFDs
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data repository
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Storehouse of information that is also called a data dictionary
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decision table
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Logical structure that shows every combination of conditions and outcomes
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decision tree
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Graphical representation of a decision table's conditions, actions, and rules
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default value
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Value for a data element if a value otherwise is not entered for it
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destination
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The DFD ending point for a data flow
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diverging data flow
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Data flow in which the same data travels to two or more different locations
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domain
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The set of values permitted for a data element
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entity
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Represented as a rectangle in a data flow diagram
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entity name
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Singular form of a department, outside organization, other system, or person
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field
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Data that is also referred to as a data element or data item
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functional primitive
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Process consisting of a single function that isn't exploded further
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gray hole
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Process that has input and output, but the input is unable to produce the output
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iteration
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Completion of a process step that is repeated until a specific condition changes
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leveling
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Uses a series of increasingly detailed DFDs to describe an information system
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logical model
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Shows what a system must do, regardless of how it is implemented physically
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logical structures
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Process building blocks that must have a single entry and exit point
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modular design
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Based on combinations of three logical structures
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origin
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The DFD beginning for a data flow
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output data flows
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Standard DFD names for the data flows leaving an entity
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parent diagram
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The higher-level diagram on a DFD that has been exploded
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physical model
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Describes how a system will be constructed in the systems design phase
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process description
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Documents the details of a functional primitive
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pseudocode
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Used in program design as a shorthand notation for actual code
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record
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Meaningful combination of related data elements
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selection
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Completion of one of two or more process steps based on results of a test
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sequence
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Logical structure that completes steps one after another
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sink
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Data flow diagram entity that receives data from a system
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source
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Data flow diagram entity that supplies data to a system
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spontaneous generation
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Process that produces output, but has no input data flow
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structured English
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Describes logical processes clearly and accurately
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terminators
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Data origins and final destinations on a data flow diagram
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Yourdon
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A popular data flow diagram symbol set
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a. logic
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Business rules, which transform data and produce required results, are also referred to as business ________ .
a. logic b. approaches c. sequences d. models |
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a. True
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As a rule, data flow diagrams should only show a data store when two or more processes use that data store.
a. True b. False |
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d. rectangle
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The symbol for a process is a ________ with rounded corners.
a. square b. pentagon c. triangle d. rectangle |
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c. record
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A(n) ________ , also known as a data structure, is a meaningful combination of related data elements that is included in a data flow or retained in a data store.
a. logical structure b. field c. record d. domain |
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a. True
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In situations in which the same data travels to two or more different locations, it is appropriate to use a diverging data flow.
a. True b. False |
