Exam 5: Data and Process Modeling

A _____ shows how data moves through an information system but does not show program logic or processing steps.

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.

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

The data dictionary usually records and describes a default value,which is the _____.

In a data flow diagram (DFD),a data flow must have a process symbol on at least one end.

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

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.

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

The primary purpose of pseudocode is to describe the underlying business logic of code.

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

Which of the following is a benefit if they use the four-model approach?

Decision trees show the logic structure in a _____.

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

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

Processes are generally very simple.

A diverging data flow is a data flow in which the same data travels to two or more different locations.

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.

In a data dictionary,data elements are combined into _____,which are meaningful combinations of data elements that are included in data flows or retained in data stores.

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

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