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Exam 5: Data and Process Modeling

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Question 41

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The disadvantage of the four-model approach is that ____.

A) it gives an unclear picture of the current system functions before any modifications or improvements are made
B) the requirements of a new information system always are different from the current information system
C) additional time and money are required to develop a logical and physical model of the current system
D) it does not take additional steps to avoid mistakes made earlier in systems development

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Question 42

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Typical process description tools include _____.

A) context diagrams
B) decision trees
C) pseudocode
D) database tables

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Question 43

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Diagram 0 (the numeral zero,and not the letter O)provides an overview of all the components that interact to form the overall system.

The iteration structure is the completion of _____.

In a data flow diagram (DFD) ,the Gane and Sarson symbol for a process is a _____.

When a data flow diagram (DFD)is exploded,the higher-level diagram is called the child diagram.

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

To draw a context diagram,you start by placing a single process symbol on the top right corner of the page.

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

_____ is the process of drawing a series of increasingly detailed data flow diagrams (DFDs) ,until all functional primitives are identified.

A _____ is logically impossible in a data flow diagram (DFD) because a process must act on input,shown by an incoming data flow,and produce output,represented by an outgoing data flow.

By showing processes as _____,an analyst can create data flow diagrams (DFDs) that show how the system functions but avoid unnecessary detail and clutter.

A decision tree is read from left to right,with the conditions along the various branches and the actions at the far left.

A _____ shows a logical structure,with all possible combinations of conditions and resulting actions.

In a data flow diagram (DFD) ,a black hole is a process that has _____.

The end product of data and process modeling is a logical model that will support business operations and meet user needs.

Data flow diagram entities also are called terminators because they are data origins or final destinations.

Data flow diagram (DFD) entities are also called _____ because they are data origins or final data destinations.

The symbol for a data flow is a triangle.

Data stores are shown in a context diagram because data stores are external to the system.