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Exam 5: Data and Process Modeling

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Question 21

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When a data flow diagram (DFD)is exploded,the lower-level diagram is referred to as the parent diagram.

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Question 22

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A _____ is a central storehouse of information about a system's data.

A) data cube
B) data feed
C) data mart
D) data repository

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Question 23

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On lower-level diagrams with multiple processes,there should not be more than nine process symbols.

In a data flow diagram (DFD) ,the Gane and Sarson symbol for an entity is a ____.

In a data dictionary,a(n) _____ is the smallest piece of data that has meaning within an information system.

In modular design,_____ is also called looping.

A _____ documents the details of a functional primitive and represents a specific set of processing steps and business logic.

If processes must be performed in a specific sequence,the information should be documented in the _____.

In a data dictionary,any name other than the standard data element name is called a(n) _____.

Since diagram 0 is a(n) _____ version of process 0,it shows considerably more detail than a context diagram.

The only disadvantage of the four-model approach is the added time and cost needed to develop a logical and physical model of the current system.

In the systems design phase,a logical model is built that describes how the system will be constructed.

In data flow diagrams (DFD),systems analysts call an entity that supplies data to the system a sink.

A data flow diagram shows the detailed contents of a data store.

In a data dictionary,_____ refers to whether the data element contains numeric,alphabetic,or character values.

What guidelines should you follow when you draw a context diagram and other data flow diagrams (DFDs)?

The symbol for a data flow is a triangle.

In DFDs,a process symbol can be referred to as a white hole,because the inputs,outputs,and general functions of the process are hidden,but the underlying details and logic are known.

Typical process description tools include _____.

Explain why an analyst may use a black box symbol.