Exam 6: Object Modeling

Explain a class diagram.Also,explain how a class diagram is like a data flow diagram (DFD).

An object belongs to a group or category called a(n)_____.

In a sequence diagram,a lifeline is identified by a _____ line.

A car performs a(n)_____ called OPERATE WIPERS when it is sent a message with the wiper control.

A(n)_____ represents a person,a place,an event,or a transaction that is significant to the information system.

Classes that send or receive messages are shown at the bottom of the sequence diagram.

A major advantage of object-oriented (O-O)designs is that systems analysts can save time and avoid errors by using _____ objects.

Systems analysts define an object's attributes during the systems design process.

In a sequence diagram,a _____ represents the time during which an object above it is able to interact with the other objects in the use case.

The focus indicates when an object sends or receives a message.

The black box concept is an example of _____,which means that all data and methods are self-contained.

_____ enable objects to communicate and interact as they perform business functions and transactions required by a system.

A(n)_____ represents the steps in a specific business function or process.

An object's _____ are the tasks or functions that the object performs when it receives a command to do so.

Some objects might have a few attributes;others might have dozens.

When the outcome of one use case is incorporated by another use case,we say that the second case uses the first case.

Using the concept of polymorphism,define messages.

A class diagram resembles a horizontal flowchart that shows the actions and events as they occur.

An object has certain _____,which are characteristics that describe the object,such as the make,model,and color of a car.

A red Mustang is a(n)_____ of the CAR class.