FiltersDone

Question type

Essay

Multiple Choice

Short Answer

True False

Matching

Exam 6: Object Modeling

Show Answer

Share

---

All types

Filters

Study FlashcardsPractice ExamLearn

Question 1

Multiple Choice

Review LaterAdd Note

Review Later

Objects within a class can be grouped into _____,which are more specific categories within a class.

A) grids
B) units
C) subclasses
D) matrices

E) A) and B)
F) B) and C)

Correct Answer

verified

Show Answer

Question 2

Essay

Review LaterAdd Note

Review Later

What do relationships enable objects to do? What is the strongest kind of relationship? Walk through an example that demonstrates your understanding of the concept.

Correct Answer

verified

Relationships enable objects to communicate and interact as they perform business functions and transactions required by the system.Relationships describe what objects need to know about each other,how objects respond to changes in other objects,and the effects of membership in classes,superclasses,and subclasses.Some relationships are stronger than others (just as a relationship between family members is stronger than one between casual acquaintances).The strongest relationship is called inheritance.Inheritance enables an object,called a child,to derive one or more of its attributes from another object,called a parent.As one example,the INSTRUCTOR object (child)inherits many traits from the EMPLOYEE object (parent),including SOCIAL SECURITY NUMBER,TELEPHONE NUMBER,and HIRE DATE.The INSTRUCTOR object also can possess additional attributes,such as TYPE OF INSTRUCTOR.Because all employees share certain attributes,those attributes are assumed through inheritance and do not need to be repeated in the INSTRUCTOR object.

Question 3

Multiple Choice

Review LaterAdd Note

A(n) _____ is a specific member of a class.

Inheritance enables an object,called a _____,to derive one or more of its attributes from a parent.

A _____ shows how an object changes from one state to another,depending on events that affect the object.

Attributes are similar to adjectives that describe the characteristics of an object.

In a use case,the _____ is shown as a stick figure with a label that identifies its role.

For a use case diagram,the _____ shows what is included in the system and what is not included in the system.

All objects within a(n) _____ share common attributes and methods.

An object includes data,but not the processes that affect that data.

Encapsulation allows objects to be used as modular components anywhere in the system.

_____ describe what objects need to know about each other,how objects respond to changes in other objects,and the effects of membership in classes,superclasses,and subclasses.

In a state transition diagram,the circle at the right with a hollow border is the initial state.

A star marks the end of the lifeline.

A control is a specific member of a class.

Explain why tools are used in object modeling.

The strongest relationship among objects is called inheritance.

A bank account object can have a specific attribute called a(n) _____ that can be active,inactive,closed,or frozen.

When a use case diagram is created,the first step is to identify the system boundary,which is represented by a _____.

By limiting access to internal processes,an object prevents its internal code from being altered by another object or process.