Deck 14: Object-Oriented Data Modeling

Question 1

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 is not adapted to the environment in which the system will actually be implemented.
C) Documentation is provided.
D) Traditional ERD is preferred.

Answer 1

A

Question 2

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.

Answer 2

C

Question 3

The Unified Modeling Language:

A) is a notation useful for graphically depicting an object-oriented analysis or design model.
B) is used in traditional ERD modeling.
C) was developed by E.F. Codd.
D) is a SQL sublanguage.

Answer 3

A

Question 4

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) data flow diagram.

Question 5

A model of a real-world application and associated properties are created in the:

A) analysis phase.
B) design phase.
C) implementation phase.
D) evaluation phase.

Question 6

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.

Question 7

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 8

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

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

Question 9

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

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 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 12

Both E-R model and object-oriented models are centered around:

A) objects.
B) encapsulation.
C) polymorphism.
D) object diagrams.

Question 13

________ 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 14

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

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

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

________ indicates how many objects participate in a given relationship.

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

Question 17

The object-oriented systems development cycle consists of:

A) two phases.
B) three phases.
C) four phases.
D) five phases.

Question 18

Object-oriented model objects differ from E-R models because:

A) OO store data.
B) OO allow data types.
C) OO objects exhibit behavior.
D) OO stores information.

Question 19

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

A) Update
B) Query
C) Constructor
D) Class-Scope

Question 20

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 21

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

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

Question 22

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 23

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

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

Question 24

When specifying a business rule between graphical symbols, a ________ is drawn from one element to the other.

A) dashed arrow
B) dashed asterisk
C) highlighted union
D) highlighted intersect

Question 25

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 26

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 27

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 28

{disjoint, complete} is an example of a UML:

A) expansion.
B) HTML link.
C) business rule constraint.
D) database clause.

Question 29

The following figure is an example of a(n):

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

Question 30

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 31

________ 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 32

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

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

Question 33

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

A) association
B) named relationship
C) assumption
D) attribute

Question 34

In the figure below, what relationship is shown?

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

Question 35

A ________ is the implementation of an operation.

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

Question 36

In the following diagram, ________ objects are present (i.e., :Registration).

A) link
B) object
C) XML
D) ERD

Question 37

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 38

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 39

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 40

The implementation of an operation is called a(n):

A) attribute.
B) class.
C) method.
D) object.

Question 41

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

Question 42

Both E-R model and object-oriented models are centered around objects.

Question 43

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

Question 44

The object-oriented systems development cycle consists of four phases.

Question 45

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

Question 46

An object encapsulates both data and behavior.

Question 47

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

Question 48

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

Question 49

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

Question 50

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

Question 51

An entity that has a well-defined role in the application domain and has a state, behavior, and identity is called an object.

Question 52

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

Question 53

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

Question 54

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

Question 55

Both Object-oriented and E-R objects exhibit behaviors.

Question 56

A state represents how an object acts.

Question 57

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

Question 58

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

Question 59

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

Question 60

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

Question 61

It is only through an operation that other objects can access or manipulate information stored in an object.

Question 62

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

Question 63

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 64

An update operation has side effects since it alters the state of an object.

Question 65

A UML is a graph of instances that are compatible with a given class diagram.

Question 66

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

Question 67

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

Question 68

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

Question 69

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

Question 70

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

Question 71

An association that has its own attributes or operations or that participates in relationships with other classes is called an association class.

Question 72

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

Question 73

A query operation does not alter the state of an object.

Question 74

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

Question 75

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 76

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

Question 77

An abstract operation describes the implementation of an operation.

Question 78

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

Question 79

A graph of instances that are compatible within a class diagram is called an object diagram.

Question 80

A destructor operation creates a new instance of a class.