Exam 5: Data and Process Modeling

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

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

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

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

The symbol for a data flow is a triangle.

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

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.

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

Explain why an analyst may use a black box symbol.

Typical process description tools include _____.

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

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

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

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

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

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

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