Systems Ch. 5

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C

1. 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

A

2. DFD symbols are referenced by using all ____ letters for the symbol name. a. capital c. italicized b. lowercase d. boldfaced

C

3. A DFD shows ____. a. how data are related b. what key fields are stored in the system c. how a system transforms input data into useful information d. what data is stored in the system

A

6. 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

C

7. A black hole 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

D

8. A gray hole 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

C

9. ____ 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. a. Spontaneous combustion b. Gray matter c. Black holes d. Black boxes

B

12. If processes must be performed in a specific sequence, you document the information in the ____. a. leveling guide b. process descriptions c. data dictionary d. DFD

B

13. Because diagram 0 is a(n) ____ version of process 0, it shows considerably more detail than a context diagram. a. contracted b. exploded c. condensed d. extrapolated

A

14. Leveling ____. a. uses a series of increasingly detailed DFDs to describe an information system b. ensures that the input and output data flows of the parent DFD are maintained on the child DFD c. uses a series of increasingly sketchy DFDs to describe an information system d. ensures that the input and output data flows of the child DFD are maintained on the parent DFD

A

15. ____ 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

A

16. ____ maintains consistency among DFDs by ensuring that input and output data flows align properly. a. Balancing c. Leveling b. Indexing d. Exploding

D

17. 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 c. exploding b. indexing d. leveling

B

18. Balancing ____. a. uses a series of increasingly detailed DFDs to describe an information system b. ensures that the input and output data flows of the parent DFD are maintained on the child DFD c. uses a series of increasingly sketchy DFDs to describe an information system d. ensures that the input and output data flows of the child DFD are maintained on the parent DFD

D

19. A data ____ is a central storehouse of information about a system’s data. a. glossary b. knowledgebase c. content bank d. repository

A

20. 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

C

21. 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. a. fields c. records b. columns d. decimals

D

22. The data dictionary usually records and describes a default value, which is the ____. a. specification of the set of values permitted for the data element b. identification of the user(s) responsible for changing values for the data element c. specification for the origination point for the data element’s value d. value for the data element if a value otherwise is not entered for it

C

23. 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

B

24. In a data dictionary, ____ refers to whether the data element contains numeric, alphabetic, or character values. a. value c. valence b. type d. domain

C

25. 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

B

26. A data dictionary specifies a data element’s ____, which is the set of values permitted for the data element. a. range b. domain c. array d. any of the above

C

27. 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

A

28. ____ 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. Modular design b. General design c. Global design d. Total design

B

29. In the accompanying figure, the sequence 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

C

32. A ____ description documents the details of a functional primitive, which represents a specific set of processing steps and business logic. a. logic c. process b. primitive d. function-based

C

36. A ____ table shows a logical structure, with all possible combinations of conditions and resulting actions. a. pseudo c. decision b. logic d. validity

C

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

A

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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