Deck 14: Object-Oriented Data Modeling

Question 1

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 1

C

Question 2

Which type of operation has side effects?

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

Answer 2

A

Question 3

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.

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

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

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

Question 6

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

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

Question 7

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

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

Question 8

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 9

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 10

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

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

Question 11

The object-oriented systems development cycle consists of:

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

Question 12

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 13

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

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

Question 14

________ 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 15

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

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

Question 16

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.

Question 17

________ indicates how many objects participate in a given relationship.

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

Question 18

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 19

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.

Question 20

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 21

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

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

Question 22

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 23

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 24

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

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

Question 25

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 26

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

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

Question 27

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

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

Question 28

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 29

In the figure below, what relationship is shown?

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

Question 30

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 31

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 32

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 33

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 34

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 35

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 36

A ________ is the implementation of an operation.

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

Question 37

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 38

________ 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 39

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

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

Question 40

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

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

Question 41

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

Question 42

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

Question 43

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

Question 44

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

Question 45

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

Question 46

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

Question 47

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

Question 48

A state represents how an object acts.

Question 49

An object encapsulates both data and behavior.

Question 50

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

Question 51

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

Question 52

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

Question 53

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

Question 54

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

Question 55

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

Question 56

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

Question 57

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

Question 58

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

Question 59

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

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

Question 60

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

Question 61

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

Question 62

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

Question 63

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

Question 64

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

Question 65

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

Question 66

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

Question 67

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

Question 68

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

Question 69

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 70

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

Question 71

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

Question 72

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

Question 73

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

Question 74

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

Question 75

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

Question 76

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

Question 77

An abstract operation describes the implementation of an operation.

Question 78

A destructor operation creates a new instance of a class.

Question 79

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

Question 80

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.