Ch. 5 Quiz [Sys. Analysis]
A _____ documents the details of a functional primitive, which represents a specific set of processing steps and business logic. a. process description b. function-based description c. logical description d. primitive description
A
A _____ shows how data acts through an information system but does not show program logic or processing steps. a. data flow diagram b. data model diagram c. data structure diagram d. data tree diagram
A
Balancing _____. a. ensures that the input and output data flows of the parent data flow diagram (DFD) are maintained on the child data flow diagram (DFD) b. ensures that the input and output data flows of the child data flow diagram (DFD) are maintained on the parent data flow diagram (DFD) c. uses a series of increasingly sketchy data flow diagrams (DFDs) to describe an information system d. uses a series of increasingly detailed data flow diagrams (DFDs) to describe an information system
A
By showing processes as _____, an analyst can create data flow diagrams (DFDs) that show how the system functions but avoid unnecessary detail and clutter. a. black boxes b. process descriptions c. decision tables d. business rules
A
Data flow diagram (DFD) entities are also called _____ because they are data origins or final data destinations. a. terminators b. pseudocodes c. gray holes d. data stores
A
In a data dictionary, _____ refers to whether the data element contains numeric, alphabetic, or character values. a. type b. pool c. valence d. domain
A
In a data dictionary, any name other than the standard data element name is called a(n) _____. a. alias b. clone c. cipher d. alias
A
In a data dictionary, data elements are combined into _____ that are meaningful combinations of data elements that are included in data flows or retained in data stores. a. records b. columns c. decimals d. fields
A
In a data dictionary, some data elements have _____ rules. For example, an employee's salary must be within the range defined for the employee's job classification. a. validity b. domain c. range d. mastered
A
In a data flow diagram (DFD), a black hole is a process that has _____. a. no output b. at least one output and one input, but the output obviously is insufficient to generate the input shown c. at least one input and one output, but the input obviously is insufficient to generate the output shown d. no input
A
In a data flow diagram (DFD), a spontaneous generation 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
A
In a data flow diagram (DFD), the Gane and Sarson symbol for an entity is a ____. a. rectangle, which may be shaded to make it look three-dimensional b. line with a single or double arrowhead c. flat rectangle that is open on the right side and closed on the left side d. rectangle with rounded corners
A
In the accompanying figure, the sequence structure is the completion of _____. a. steps in a chronological order, one after another b. one or more process steps based on the results of a test or condition c. a process step that is repeated until a specific condition changes d. a specific condition that is repeated until a process changes
A
Many analysts follow _____, which means that they develop a physical model of the current system, a logical model of the current system, a logical model of the new system, and a physical model of the new system. a. a four-model approach b. the Gane and Sarson symbol c. a process description d. the Zachman Framework
A
Nathan is an expert on all of the different kinds of process description tools. So, when his colleagues have questions, they know where to turn. One of the firm's trainee analysts is working on a financial process that will continue to print vendor payments until it reaches the end of the file. Which of the following processes will Nathan suggest the analyst to use? a. Iteration b. Concatenation c. Sequence d. Selection
A
Since diagram 0 is a(n) _____ version of process 0, it shows considerably more detail than a context diagram. a. exploded b. condensed c. extrapolated d. contracted
A
The analysts at Techno InfoSystems are considering the four-model approach to system development for a new client. If they make use of the four-model approach, which of the following is a likely outcome? a. Time taken to develop the model increases. b. It will not be possible to get a clear picture of the current system functions before modifications are made. c. The requirements of a new information system will always be different from the current information system. d. Costs needed to develop a logical and physical model of the current system will be less.
A
The iteration structure is the completion of _____. a. a process step that is repeated until a specific condition changes b. a specific condition that is repeated until a process changes c. one or more process steps based on the results of a test or condition d. steps in a chronological order, one after another
A
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. length b. valence c. domain d. index
A
The data dictionary usually records and describes a default value, which is the _____. a. value for the data element if a value otherwise is not entered for it b. identification of the user(s) responsible for changing values for the data element c. the set of values permitted for the data element d. specification for the origination point for the data element's value
A
A _____ is a graphical representation of the conditions, actions, and rules found in a decision table. a. decision board b. decision tree c. decision point d. decision element
B
A _____ shows a logical structure, with all possible combinations of conditions and resulting actions. a. validation table b. decision table c. pseudo table d. database table
B
Among the symbols in the accompanying figure, a _____ is used to represent data that a system stores because one or more processes need to use the data at a later time. a. gray hole b. data store c. data flow d. process
B
If processes must be performed in a specific sequence, the information should be documented in the _____. a. leveling guide b. process descriptions c. data flow diagram (DFD) d. data dictionary
B
In a data dictionary, a(n) _____ is the smallest piece of data that has meaning within an information system. a. record b. field c. pixel d. index
B
In a data flow diagram (DFD), the Gane and Sarson symbol for a process is a _____. a. flat rectangle that is open on the right side and closed on the left side b. rectangle with rounded corners c. line with a single or double arrowhead d. rectangle, which may be shaded to make it look three-dimensional
B
In data and process modeling, a(n) _____ shows what the system must do, regardless of how it will be implemented physically. a. organizational model b. logical model c. physical model d. relational model
B
In data flow diagrams (DFDs), a process resembles a _____, where the inputs, outputs, and general functions of the process are known, but the underlying details are not shown. a. decision table b. black box c. terminator d. business rule
B
The disadvantage of the four-model approach is that ____. a. the requirements of a new information system always are different from the current information system b. additional time and cost are required to develop a logical and physical model of the current system c. it does not take additional steps to avoid mistakes made earlier in systems development d. it gives an unclear picture of the current system functions before any modifications or improvements are made
B
The major benefit of _____ is that it gives a clear picture of current system functions before any modifications or improvements are made. a. leveling b. the four-model approach c. balancing d. the Zachman Framework
B
The selection structure is the completion of _____. a. a process step that is repeated until a specific condition changes b. one or more process steps based on the results of a test or condition c. a specific condition that is repeated until a process changes d. steps in a chronological order, one after another
B
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. a. balancing b. leveling c. exploding d. indexing
B
Which of the following provides a report of all data flows and data stores that use a particular data element? a. Data warehouses b. Data dictionaries c. Data types d. Databases
B
In a data flow diagram (DFD), a gray hole is a process that has _____. a. no output b. at least one input and one output, but the input obviously is insufficient to generate the output shown c. at least one output and one input, but the output obviously is insufficient to generate the input shown d. no input
B
_____ is the process of drawing a series of increasingly detailed data flow diagrams (DFDs), until all functional primitives are identified. a. Balancing b. Leveling c. Looping d. Indexing
B
Ensures that the input and output data flows of the parent DFD are maintained on the child DFD
Balancing
A data flow diagram (DFD) shows _____. a. how data is related b. what data is stored in the system c. how a system transforms input data into useful information d. what key fields are stored in the system
C
Among the symbols in the accompanying figure, a _____ receives input data and produces output that has a different content, form, or both. a. data store b. data flow c. process d. gray hole
C
In a data flow diagram (DFD), the Gane and Sarson symbol for a data flow is a _____. a. segment of a differentiable curve b. flat rectangle that is open on the right side and closed on the left side c. line with a single or double arrowhead d. triangle, which may be shaded to make it look three-dimensional
C
In a data flow diagram (DFD), the Gane and Sarson symbol for a data store is a _____. a. rectangle with rounded corners b. rectangle, which may be shaded to make it look three-dimensional c. flat rectangle that is open on the right side and closed on the left side d. line with a single or double arrowhead
C
In modular design, _____ also is called looping. a. process description b. selection c. iteration d. sequence
C
A _____ is a central storehouse of information about a system's data. a. data cube b. data mart c. data feed d. data repository
D
A _____ is logically impossible in a data flow diagram (DFD) because a process must act on input, shown by an incoming data flow, and produce output, represented by an outgoing data flow. a. gray matter b. spontaneous combustion c. server farm d. black hole
D
A data dictionary specifies a data element's _____, which is the set of values permitted for the data element. a. record b. array c. index d. domain
D
Among the symbols in the accompanying figure, a _____ is a path for data to move from one part of the information system to another. a. gray hole b. data store c. process d. data flow
D
Decision trees show the logic structure in a _____. a. vertical form that resembles a tree with the roots at the top and the branches at the bottom b. vertical form that resembles a tree with the roots at the bottom and the branches at the top c. horizontal form that resembles a tree with the roots at the right and the branches to the left d. horizontal form that resembles a tree with the roots at the left and the branches to the right
D
In addition to the Gane and Sarson symbol set, another popular symbol set is _____. a. Zachman b. Mantissa c. Jira d. Yourdon
D
Leveling _____. a. ensures that the input and output data flows of the parent data flow diagram (DFD) are maintained on the child data flow diagram (DFD) b. ensures that the input and output data flows of the child data flow diagram (DFD) are maintained on the parent data flow diagram (DFD) c. uses a series of increasingly sketchy data flow diagrams (DFDs) to describe an information system d. uses a series of increasingly detailed data flow diagrams (DFDs) to describe an information system
D
The analysts at Techno InfoSystems are considering the four-model approach to system development for a new client. Which of the following is a benefit if they use the four-model approach? a. It will not incur additional costs to develop logical and physical model of the current system. b. It will take less time to build a logical and physical model of the current system. c. It will provide time to create the current system models even for projects with tight schedules. d. It will provide a clear picture of current system functions before any modifications or improvements are made.
D
Structured English might look familiar to programming students because it resembles _____, which is used in program design. a. a decision tree b. decision code c. iterative code d. pseudocode
D
_____ 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. a. Interface design b. Product design c. Visual design d. Modular design
D
Documentation of all data flows along with documenting each data element
Data dictionary
Data flow diagram (DFD) component that represents one or more data items
Data flow
Shows how a system transforms input data into useful information
Data flow diagram (DFD)
Can have more than two possible outcomes in addition to multiple conditions
Decision table
Describes how a system will be constructed
Physical model
A data structure that contains a set of related data elements that are stored and processed together
Record
A set of Data flow diagrams (DFDs) that 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
Structured analysis
Nathan is an expert on all of the different kinds of process description tools. So, when his colleagues have questions, they know where to turn. Another of the firm's analysts is unable to figure out what is wrong with some structured English he has been using to describe the processing logic. Nathan walks over and spots the problem in an instant. Which of the following can Nathan identify as the problem? a. The structured English is indented. b. The structured English is used as a shorthand notation for actual code by programmers. c. The structured English is not using a sequence, selection, or iteration structure. d. The structured English uses a limited vocabulary.
C
Typical process description tools include _____. a. database tables b. pseudocode c. decision trees d. context diagrams
C
_____ maintains consistency among data flow diagrams (DFDs) by ensuring that input and output data flows align properly. a. Indexing b. Shipping c. Balancing d. Adapting
C
An analyst starts with an overall view, which is a context diagram with a single process symbol
Leveling
Shows what the system must do, regardless of how it will be implemented
Logical model