ISA 387 Chapter 5 Quiz | Verified with 100% Correct Answers Among the symbols in the accompanying figure, a _____ receives input data and produces output that has a different content, form, or both. data flow gray hol
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ISA 387 Chapter 5 Quiz | Verified with 100% Correct Answers Among the symbols in the accompanying figure, a _____ receives input data and produces output that has a different content, form, or both. data flow gray hole process data store In a data flow diagram (DFD), systems analysts call an entity that receives data from the system a source. True False Data stores are shown in a context diagram because data stores are external to the system. False True 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. length domain valence index On lower-level diagrams with multiple processes, there should not be more than nine process symbols. False True In a data flow diagram (DFD), a process symbol can have only one outgoing data flow. False True A data flow diagram shows the detailed contents of a data store. False True Balancing _____. ensures that the input and output data flows of the child data flow diagram (DFD) are maintained on the parent data flow diagram (DFD) ensures that the input and output data flows of the parent data flow diagram (DFD) are maintained on the child data flow diagram (DFD) uses a series of increasingly detailed data flow diagrams (DFDs) to describe an information system uses a series of increasingly sketchy data flow diagrams (DFDs) to describe an information system Deciding whether to explode a process further or determine that it is a functional primitive is a matter of experience, judgment, and interaction with programmers who must translate the logical design into code. True False 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. gray hole process data flow data store A _____ is a central storehouse of information about a system's data. data mart data repository data feed data cube In a data flow diagram (DFD), the Gane and Sarson symbol for a data flow is a _____. segment of a differentiable curve line with a single or double arrowhead triangle, which may be shaded to make it look three-dimensional flat rectangle that is open on the right side and closed on the left side Processes contain the business logic, also called business rules, which transforms the data and produces the required results. False True 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. the Gane and Sarson symbol a four-model approach a process description the Zachman Framework A _____ shows a logical structure, with all possible combinations of conditions and resulting actions. database table decision table pseudo table validation table Spontaneous generation, black holes, and gray holes are impossible logically in a data flow diagram. False True Data flow diagram (DFD) entities are also called _____ because they are data origins or final data destinations. gray holes data stores terminators pseudocodes A decision tree is read from left to right, with the conditions along the various branches and the actions at the far left. True False 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. black box terminator business rule decision table _____ is the process of drawing a series of increasingly detailed data flow diagrams (DFDs), until all functional primitives are identified. Looping Leveling Balancing Indexing A _____ shows how data moves through an information system but does not show program logic or processing steps. data flow diagram data model diagram data tree diagram data structure diagram The symbol for a data flow is a triangle. True False What makes one system more complex than another is the number of components, the number of levels, and the degree of interaction among its processes, entities, data stores, and data flows. True False In a data flow diagram (DFD), the Gane and Sarson symbol for a process is a _____. line with a single or double arrowhead flat rectangle that is open on the right side and closed on the left side rectangle with rounded corners rectangle, which may be shaded to make it look three-dimensional When a context diagram is expanded into data flow diagram (DFD) diagram 0, all the connections that flow into and out of process 0 must be retained. False True The major benefit of _____ is that it gives a clear picture of current system functions before any modifications or improvements are made. leveling the Zachman Framework the four-model approach balancing To draw a context diagram, you start by placing a single process symbol on the top right corner of the page.
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