Deck 13: Object-Oriented Data Modeling

Question 1

An operation that applies to a class rather than an object instance is a(n):

A) constructor operation.
B) query operation.
C) class-scope operation.
D) update operation.

Answer 1

C

Question 2

Which of the following is a reason for using an object-oriented design?

A) The analysis model is not formal enough to be implemented in a programming language.
B) The actual system must be adapted to the environment in which the system will actually be implemented.
C) The analysis results can be validated using object-oriented design.
D) All of the above.

Answer 2

D

Question 3

Which of the following is a function or service provided by all instances of a class?

A) operation
B) implementation
C) class group
D) query

Answer 3

A

Question 4

In the figure below,which of the following is true?

A) Students use various software tools for different courses.
B) Students can only register for one course.
C) Students use only one type of software.
D) Each course uses specific software.

Question 5

All of the following are benefits of object-oriented modeling EXCEPT:

A) the ability to tackle more challenging problem domains.
B) increased consistency among analysis, design, and programming activities.
C) decreased communication among the users, analysts, designers, and programmers.
D) reusability of analysis, design, and programming results.

Question 6

A graph of instances that are compatible within a class diagram is called a(n):

A) object group.
B) method chart.
C) object diagram.
D) ERD.

Question 7

A diagram that shows the static structure of an object-oriented model is called a(n):

A) structure diagram.
B) class diagram.
C) entity diagram.
D) none of the above.

Question 8

________ is the technique of hiding the internal implementation details of an object from its external view.

A) Grouping
B) Encapsulation
C) Classification
D) Mining

Question 9

An association ________ is an association that has attributes or operations of its own.

A) link
B) group
C) class
D) body

Question 10

The end of an association where it connects to a class is called a(n):

A) connector.
B) terminator.
C) initiator.
D) association role.

Question 11

Which type of operation has side effects?

A) Update
B) Append
C) Query
D) Scope

Question 12

Which of the following refers to a set of objects that share common structures and behaviors?

A) Supertype
B) Object class
C) Model
D) Entity group

Question 13

An operation that creates a new instance of a class is called a(n):

A) query operation.
B) update operation.
C) scope operation.
D) constructor operation.

Question 14

A(n)________ is a concept,abstraction,or thing that has a state,behavior,and identity.

A) relationship
B) attribute
C) key
D) object

Question 15

A(n)________ encompasses an object's properties and the values of those properties.

A) state
B) attribute
C) method
D) behavior

Question 16

The Unified Modeling Language:

A) is a notation useful for graphically depicting an object-oriented analysis or design model.
B) allows one to capture design decisions of a system.
C) promotes communication among key personnel involved in development.
D) all of the above.

Question 17

Which of the following operations does not alter the state of an object?

A) Update
B) Query
C) Constructor
D) None of the above

Question 18

In the figure below,which of the following is true?

A) A faculty may advise only one student.
B) A faculty may advise up to a maximum of 10 students.
C) A course offering may be offered for multiple courses.
D) A student can have more than one advisor.

Question 19

________ indicates how many objects participate in a given relationship.

A) Bound
B) Multiplicity
C) Role
D) Relationship

Question 20

A(n)________ is shown as a solid line between the participating classes.

A) connector
B) update
C) entity
D) association

Question 21

According to the UML Notation Guide,complete means:

A) a descendant may come from more than one supertype.
B) a descendant may be not descended from more than one of the subclasses.
C) all subclasses have been specified, and no others are expected.
D) the list of objects is not stable.

Question 22

When an object is an instance of more than one class,it is called:

A) multiplicity.
B) polymorphism.
C) multiple classification.
D) multiple associations.

Question 23

A ________ is the implementation of an operation.

A) meta-operation
B) method
C) query
D) constructor

Question 24

A state represents how an object acts.

Question 25

An object encapsulates both data and behavior.

Question 26

An object class is a set of objects that share a common structure and behavior.

Question 27

A(n)________ defines the form or protocol of an operation,but not its implementation.

A) meta-operation
B) inquisitor
C) abstract operation
D) operation descriptor

Question 28

An association role is the end of an association where it connects to a class.

Question 29

A(n)________ is an attribute of a class that specifies a value common to an entire class.

A) completion attribute
B) class-scope attribute
C) overall descriptor
D) summary descriptor

Question 30

The process of replacing a method inherited from a superclass by a more specific implementation of the method in a subclass is called:

A) inheritance.
B) encapsulation.
C) polymorphism.
D) overriding.

Question 31

A class that has direct instances is called a(n)________ class.

A) abstract
B) multiplicity
C) large
D) concrete

Question 32

In the figure below,what relationship is shown?

A) Overlaps
B) Disjoints
C) Rejoinders
D) Aggregation

Question 33

An operation is a function or service that is provided by all of the classes.

Question 34

A constructor operation does not alter an instance of a class.

Question 35

A class diagram shows the dynamic structure of an object-oriented model.

Question 36

A part object which belongs to only one whole object,and which lives and dies with the whole object is called a(n):

A) dependent.
B) weak entity.
C) composition.
D) declarative.

Question 37

________ means that the same operation can apply to two or more classes in different ways.

A) Polymorphism
B) Inheritance
C) Combined operations
D) Checkpoint

Question 38

A class-scope operation applies to a class rather than an object instance.

Question 39

Encapsulation is the technique of hiding the internal implementation details of an object from its external view.

Question 40

According to the UML Notation Guide,overlapping means:

A) a descendant may be descended from more than one of the subclasses.
B) a descendant may not be descended from more than one of the subclasses.
C) all subclasses have been specified, and no others are expected.
D) the list of objects is stable, but relationships will change.

Question 41

An aggregation expresses a part-of relationship between a component object and an aggregate object.

Question 42

An association class is an association that participates in no relationships.

Question 43

Polymorphism occurs when the same operation may apply to two or more classes in different ways.

Question 44

A derived attribute,association,or role is one that can be computed or derived from other attributes,associations,or roles.

Question 45

According to the UML Notation Guide,the term disjoint means that a descendent may not be descended from more than one of the subclasses.

Question 46

In addition to specifying the multiplicity of an association role,you can also specify other properties,for example,if the objects playing the role are ordered or not.

Question 47

In composition,a part belongs to many whole objects.

Question 48

A ternary relationship can easily be replaced by three binary relationships.

Question 49

Overriding for optimization implements a new operation with improved code by exploiting the restrictions imposed by the superclass.

Question 50

If a subclass of a company inherits an operation to compute a tax but extends the inherited behavior by adding a foreign surcharge,this is an example of overriding for extension.

Question 51

Overriding is the process of replacing a method inherited from a superclass by a more specific implementation of that method in a subclass.

Question 52

A composition is an instance of class that is made up of more than one class.

Question 53

An instance of a subclass is not always an instance of its superclass.

Question 54

A class-scope attribute is an attribute of a class that specifies a value common to an instance of a class.

Question 55

An abstract operation describes the implementation of an operation.

Question 56

A class that can have direct instances is called an abstract class.

Question 57

Each role has a duplicity,which indicates how many objects participate in a given relationship.

Question 58

The most common multiplicities are 0..1,*,and 1.

Question 59

In overriding for restriction,the protocol of the new operation in the subclass is restricted.

Question 60

An association class is similar to an associative entity in the E-R model.

Question 61

A(n)________ operation has side effects since it alters the state of an object.

Question 62

A(n)________ is the end of an association where it connects to a class.

Question 63

A(n)________ attribute,role or association is one that can be computed from other attributes,roles,or associations.

Question 64

________ is the technique of hiding the internal implementation details of an object from its external view.

Question 65

An entity that has a well-defined role in the application domain,and has a state,behavior,and identity is called a(n)________.

Question 66

In aggregation,some of the operations of the whole automatically apply to its parts.

Question 67

A(n)________ is a named relationship between or among classes.

Question 68

A(n)________ in a class diagram is shown as a text string representing an interval (or intervals)of integers.

Question 69

A class that has no direct instances,but whose descendants may have direct instances is called a(n)________.

Question 70

A(n)________ operation creates a new instance of a class.

Question 71

A(n)________ attribute is an attribute of a class that specifies a value common to an entire class,rather than a specific value for an instance.

Question 72

It is only through a(n)________ that other objects can access or manipulate information stored in an object.

Question 73

________ encompasses an object's properties and the values of those properties.

Question 74

The implementation of a operation is called a(n)________.

Question 75

A(n)________ shows the static structure of an object-oriented model.

Question 76

A(n)________ is a graph of instances that are compatible with a given class diagram.

Question 77

When an operation may apply to two or more classes in different ways,this is known as ________.

Question 78

A(n)________ operation does not alter the state of an object.

Question 79

An association that has its own attributes or operations or that participates in relationships with other classes is called a(n)________.

Question 80

The process of replacing a method inherited from a superclass by a more specific implementation of that method in a subclass is called ________.