TIFKK7Ch07 - Chapter 7 Systems Analysis and Design 7-1...

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Chapter 7 Systems Analysis and Design 7-1 Chapter 7 True-False 1 . The data flow diagram graphically characterizes data processes and flows in a business system. T (p. 217) 2 . The biggest advantage of the data flow approach lies in the conceptual freedom found in the use of the four symbols. T (p. 218) 3 . The data flow diagram may be used to analyze the proposed system. T (p. 218) 4 . An arrow is used to depict an external entity that can give and receive data from the system. F (p. 219) 5 . Each external entity is labeled with a noun. T (p. 219) 6 . A rectangle with rounded corners is used to show the occurrence of a transforming process. T (p. 219) 7 . Processes in a rectangle with rounded corners sometimes denote something other than a change in or transformation of data or a system/subsystem. F (p. 219) 8 . Processes that transform data should be named with a noun which indicates the data that has been transformed. F (p. 219) 9 . In logical data flow diagrams, the type of physical storage is unspecified. T (p. 219) 1 0 . The name of the data flow coming out of a process should be different than the name of the data flow going into the process. T (p. 219) 1 1 . Processes may have the same number if they are on different levels. F (p. 219) 1 2 . The systems analyst needs to conceptualize data flows from a top-down perspective. T (p. 220) 1 3 . The highest level data flow diagram is called Diagram 0. F (p. 220) 1 4 . With a top-down approach, the diagrams move from specific to general. F (p. 220) 1 More detail is achievable through using a process called "exploding the diagrams." T (p. 221)
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Chapter 7 Using Data Flow Diagrams 7-2 1 6 . Data flow diagrams must be drawn working from left to right on the page. F (p. 221) 1 7 . All data flow must either originate or terminate on a process. T (p. 224) 1 8 . Data stores may be directly connected to each other by a data flow. F (p. 224) 1 9 . Linear data flow from process to process is normal in higher level data flow diagrams. F (p. 225) 2 0 . Unbalanced decomposition means that the data flow to or from a parent process does not match the data flow in or out of a child diagram. T (p. 225) 2 1 . A logical data flow diagram shows how the business operates. T (p. 225) 2 2 . A physical data flow diagram shows how the system will be implemented. T (p. 225) 2 3 . Transaction files are used to link all logical data flow diagram processes. F (p. 229) 2 4 . Partitioning is used to create a set of computer programs and manual procedures from a data flow diagram. T (p. 232) 2 5 . A CRUD matrix is a tool used to represent where master files are read, updated, created, and deleted within the system. T (p. 229) 2 6 . A use case summarizes an event and defines one activity. T (p. 232) 2 7 . Partitioning may be used to show which Web pages are placed on a secure server and which
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TIFKK7Ch07 - Chapter 7 Systems Analysis and Design 7-1...

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