Quiz 8: Structuring System Data Requirements
Computing
Q 1Q 1
The characteristics of data captured during data modeling are crucial in the design of databases,programs,computer screens,and printed reports.
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True False
True
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True False
False
Q 3Q 3
The purpose of the conceptual data model is to show as many rules about the meaning and interrelationships among data as possible.
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True False
True
Q 4Q 4
The names of data stores on primitive-level data flow diagrams often correspond to the names of data entities in entity-relationship diagrams.
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True False
Q 5Q 5
The primary deliverable from the conceptual data modeling step within the analysis phase is an entity-relationship diagram.
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True False
Q 6Q 6
A deliverable from conceptual data modeling is a set of entries about data objects to be stored in the project dictionary or repository
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True False
Q 7Q 7
The top-down approach to data modeling derives the business rules for a data model from an intimate understanding of the nature of the business.
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True False
Q 8Q 8
The bottom-up approach to data modeling derives a data model by reviewing specific business documents.
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True False
Q 9Q 9
In order to determine the integrity rules,minimum and maximum cardinality,and time dimensions of data,an analyst might ask,"Are values for data characteristics limited in any way?"
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True False
Q 10Q 10
An entity is a person,place,object,event,or concept in the user environment about which the organization wishes to maintain data.
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True False
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True False
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True False
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True False
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True False
Q 15Q 15
A true data entity will have many possible instances,each with a distinguishing characteristic,as well as one or more other descriptive pieces of data.
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True False
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True False
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True False
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True False
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True False
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True False
Q 21Q 21
An identifier is a candidate key that has been selected as the unique,identifying characteristic for an entity type.
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True False
Q 22Q 22
When selecting an identifier,one should choose a candidate key that will not change its value over the life of each instance of the entity type.
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True False
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True False
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True False
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True False
Q 26Q 26
One way to handle repeating data within an entity is to separate the repeating data into another entity,called a weak entity.
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True False
Q 27Q 27
A multivalued attribute is an attribute that may take on more than one value for each entity instance.
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True False
Q 28Q 28
A repeating group is a set of two or more multivalued attributes that are logically related.
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True False
Q 29Q 29
A join is an association between the instances of one or more entity types that is of interest to the organization.
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True False
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True False
Q 31Q 31
The goal of conceptual data modeling is to capture as much of the meaning of data as possible.
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True False
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True False
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True False
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True False
Q 35Q 35
Cardinality is the number of instances of entity B that can (or must)be associated with each instance of entity A.
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True False
Q 36Q 36
The minimum cardinality of a relationship is the minimum number of instances of entity B that may be associated with each instance of entity A.
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True False
Q 37Q 37
A plural relationship is a relationship that the data modeler chooses to model as entity type.
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True False
Q 38Q 38
A relationship must be turned into an associative entity when the associative entity has other relationships with entities besides the relationship that caused its creation.
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True False
Q 39Q 39
On an entity relationship diagram,total specialization is shown by a single line from the supertype to the subtype.
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True False
Q 40Q 40
Conceptual data modeling for an Internet-based electronic commerce application differs significantly from the process followed when analyzing the data needs for other types of applications.
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True False
Q 41Q 41
Universal data models and industry-specific data models are two types of packaged conceptual data models.
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True False
Q 42Q 42
Entity integrity means each instance of an entity type must have a unique identifier that is not null.
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True False
Q 43Q 43
Referential integrity constraints are rules concerning the relationships between entity types.
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True False
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True False
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True False
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True False
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True False
Q 48Q 48
Triggering operations are other business rules that protect the validity of attribute values.
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True False
Q 49Q 49
Some systems developers believe that a data model is the most important part of the statement of information system requirements because:
A)the characteristics of data captured during data modeling are crucial in the design of databases,programs,computer screens,and printed reports
B)data rather than processes are the most complex aspects of many modern information systems and thus require a central role in structuring system requirements
C)the characteristics about data are reasonably permanent
D)all of the above
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Multiple Choice
Q 50Q 50
Which of the following is a true statement?
A)Data characteristics are dynamic.
B)A data model explains the transient form of an organization.
C)An information system design based on a data orientation,rather than a process or logic orientation,should have a longer useful life.
D)Data flow paths are permanent.
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Multiple Choice
Q 51Q 51
The most common format used for data modeling is:
A)state-transition diagramming
B)entity-relationship diagramming
C)process modeling
D)decision table diagramming
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Multiple Choice
Q 52Q 52
During requirements structuring:
A)an E-R model represents conceptual data requirements for a particular system
B)the conceptual E-R data model is refined before it is translated into a logical format from which database definition and physical database design are done
C)an enterprise-wide data model with very broad categories of data and little detail is prepared
D)a specific E-R model is built to help explain the scope of a particular systems analysis and design effort
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Multiple Choice
Q 53Q 53
Conceptual data modeling is typically done in parallel with other requirements analysis and structuring steps during:
A)logical design
B)physical design
C)analysis
D)implementation
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Multiple Choice
Q 54Q 54
Process,logic,and data model descriptions of a system must be consistent and complete because:
A)they each describe different but complementary views of the same information system
B)they are prepared during the analysis phase
C)they are constructed in parallel by separate analyst teams
D)programming tasks require the integration of the information contained in the diagrams
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Multiple Choice
Q 55Q 55
An E-R model with attributes is prepared during:
A)design
B)project identification and selection
C)analysis
D)project initiation and planning
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Multiple Choice
Q 56Q 56
The primary deliverable from the conceptual modeling step within the analysis phase is a(n):
A)state-transition diagram
B)E-R diagram
C)context data flow diagram
D)decision tree
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Multiple Choice
Q 57Q 57
The data modeling perspective that derives the business rules for a data model from an intimate understanding of the nature of the business,rather than from any specific information requirements in screens,reports,or business forms,is referred to as the:
A)top-down approach
B)bottom-up approach
C)overview approach
D)business approach
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Multiple Choice
Q 58Q 58
The three main constructs of the entity-relationship modeling notation include each of the following except:
A)data entities
B)data flows
C)relationships
D)attributes
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Multiple Choice
Q 59Q 59
A detailed,logical representation of the entities,associations,and data elements for an organization or business area defines:
A)entity-relationship diagram
B)conceptual model
C)entity-relationship model
D)data flow diagram
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Multiple Choice
Q 60Q 60
A person,place,object,event,or concept in the user environment about which the organization wishes to maintain data refers to a(n):
A)attribute
B)data element
C)relationship
D)entity
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Multiple Choice
Q 61Q 61
A collection of entities that share common properties or characteristics defines:
A)entity type
B)entity instance
C)entity occurrence
D)entity collection
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Multiple Choice
Q 62Q 62
A single occurrence of an entity type defines:
A)entity instance
B)entity appearance
C)attribute
D)data element
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Multiple Choice
Q 63Q 63
A named property or characteristic of an entity that is of interest to the organization defines:
A)attribute
B)relationship
C)instance
D)gerund
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Multiple Choice
Q 64Q 64
An attribute (or combination of attributes)that uniquely identifies each instance of an entity type defines:
A)data element occurrence
B)trigger
C)candidate key
D)gerund
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Multiple Choice
Q 65Q 65
When selecting an identifier,one should:
A)use intelligent keys
B)use large composite keys instead of single-attribute surrogate keys
C)choose a candidate key that will not change its value over the life of each instance of the entity type
D)choose a candidate key such that for each instance of the entity,the attribute is guaranteed to have valid values or is null
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Multiple Choice
Q 66Q 66
A candidate key that has been selected as the unique,identifying characteristic for an entity type is called a(n):
A)attribute
B)identifier
C)secondary key
D)gerund
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Multiple Choice
Q 67Q 67
For each entity,the name of the identifier is:
A)identified by using a double-lined ellipse
B)underlined on an E-R diagram
C)bold on an E-R diagram
D)written in all capital letters on an E-R diagram
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Multiple Choice
Q 68Q 68
An attribute that may take on more than one value for each entity instance is referred to as a:
A)gerund
B)multivalued attribute
C)nonexclusive attribute
D)supertype
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Multiple Choice
Q 69Q 69
If each employee can have more than one skill,then SKILL is referred to as a:
A)gerund
B)multivalued attribute
C)nonexclusive attribute
D)repeating attribute
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Multiple Choice
Q 70Q 70
A set of two or more multivalued attributes that are logically related defines:
A)relationship
B)gerund
C)repeating group
D)class
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Multiple Choice
Q 71Q 71
An association between the instances of one or more entity types that is of interest to the organization best defines:
A)occurrence
B)relationship
C)coupling
D)cardinality
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Multiple Choice
Q 72Q 72
If STUDENT and COURSE participate in a relationship,their relationship is a(n):
A)unary relationship
B)binary relationship
C)ternary relationship
D)extraordinary relationship
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Multiple Choice
Q 73Q 73
A simultaneous relationship among instances of three entity types is a:
A)unary relationship
B)binary relationship
C)ternary relationship
D)multiple occurrence
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Multiple Choice
Q 74Q 74
The number of instances of entity B that can (or must)be associated with each instance of entity A refers to:
A)cardinality
B)domain
C)ternary occurrence
D)participation level
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Multiple Choice
Q 75Q 75
The minimum number of instances of entity B that may be associated with each instance of entity A defines the:
A)degree of the relationship
B)minimum cardinality of the relationship
C)maximum cardinality of the relationship
D)domain of the relationship
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Multiple Choice
Q 76Q 76
If entity B is a mandatory participant,then:
A)the minimum cardinality of the relationship is two
B)the minimum cardinality of the relationship cannot be defined
C)the minimum cardinality of the relationship is one
D)the minimum cardinality of the relationship is optional
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Multiple Choice
Q 77Q 77
A relationship that the data modeler chooses to model as an entity type best defines:
A)recursive relationship
B)associative entity
C)domain
D)complex relationship
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Multiple Choice
Q 78Q 78
A subgrouping of the entities in an entity type that is meaningful to the organization and that shares common attributes or relationships distinct from other subgroupings best defines:
A)child node
B)disjoined entity
C)subtype
D)supertype
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Multiple Choice
Q 79Q 79
Which of the following specifies that each entity instance of the supertype must be a member of some subtype in the relationship?
A)total specialization rule
B)partial specialization rule
C)disjoint rule
D)overlap rule
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Multiple Choice
Q 80Q 80
Which of the following specifies that an entity instance can simultaneously be a member of two (or more)subtypes?
A)total specialization rule
B)partial specialization rule
C)disjoint rule
D)overlap rule
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Multiple Choice
Q 81Q 81
Which of the following specifies that an entity instance of the supertype is allowed not to belong to any subtype?
A)total specialization rule
B)partial specialization rule
C)disjoint rule
D)overlap rule
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Multiple Choice
Q 82Q 82
Which of the following specifies that if an entity instance of the supertype is a member of one subtype it cannot simultaneously be a member of any other subtype?
A)total specialization rule
B)partial specialization rule
C)disjoint rule
D)overlap rule
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Multiple Choice
Q 83Q 83
Specifications that preserve the integrity of the logical data model are:
A)requirements specifications
B)integrity restrictions
C)business limitations
D)business rules
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Multiple Choice
Q 84Q 84
Which of the following addresses the rules concerning the relationships between entity types?
A)referential integrity constraints
B)triggering operations
C)entity integrity
D)domains
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Multiple Choice
Q 85Q 85
Which of the following specifies that each instance of an entity type must have a unique identifier that is not null?
A)referential integrity constraints
B)triggering operations
C)entity integrity
D)domains
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Multiple Choice
Q 86Q 86
Which of the following refers to the set of all data types and values that an attribute can assume?
A)referential integrity constraints
B)triggering operations
C)entity integrity
D)domains
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Multiple Choice
Q 87Q 87
Which of the following refers to an assertion or rule that governs the validity of data manipulation operations such as insert,update,and delete?
A)referential integrity constraints
B)triggering operations
C)entity integrity
D)domains
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Multiple Choice
Q 88Q 88
The set of all data types and ranges of values that an attribute can assume defines:
A)cardinality
B)constraint set
C)domain
D)reference set
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Multiple Choice
Q 89Q 89
An assertion or rule that governs the validity of data manipulation operations such as insert,update,and delete is:
A)triggering operation
B)entity integrity
C)referential integrity constraints
D)domains
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Multiple Choice
Q 90Q 90
The data manipulation operation (insert,delete,or update)that initiates the operation is called a(n):
A)condition
B)action
C)user rule
D)event
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Multiple Choice
Q 91Q 91
A concise statement of the business rule to be enforced by the triggering operation refers to:
A)user rule
B)condition
C)action
D)event
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Multiple Choice
Q 92Q 92
The condition that causes the operation to be triggered.
A)condition
B)user rule
C)entity name
D)user rule
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Multiple Choice
Q 93Q 93
All of the following are benefits of database patterns and packaged data models EXCEPT:
A)purchased models are proven from extensive experience
B)systems analysis is facilitated
C)purchased models are very specific
D)purchased models anticipate future needs
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Multiple Choice
Q 94Q 94
A __________ is a detailed model that captures the overall structure of organizational data that is independent of any database management system or other implementation considerations.
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Short Answer
Q 95Q 95
An __________ is a detailed,logical representation of the entities,associations,and data elements for an organization or business area.
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Q 97Q 97
An __________ is a named property or characteristic of an entity that is of interest to the organization.
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Q 98Q 98
An __________ is a candidate key that has been selected as the unique,identifying characteristic for an entity type.
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Q 101Q 101
A __________ is an association between the instances of one or more entity types that is of interest to the organization.
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Q 105Q 105
__________ refers to the number of instances of entity B that can (or must)be associated with each instance of entity A.
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Q 106Q 106
An __________ is an entity type that associates the instances of one or more entity types and contains attributes that are peculiar to the relationship between those entity instances.
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Q 107Q 107
A __________ is a subgrouping of the entities in an entity type that is meaningful to the organization and that shares common attributes or relationships distinct from other subgroupings.
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Q 109Q 109
The __________ specifies that if an entity instance of the supertype is a member of one subtype,it cannot simultaneously be a member of any other subtype.
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Q 110Q 110
The __________ specifies that an entity instance can simultaneously be a member of two (or more)subtypes.
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Q 111Q 111
The __________ specifies that an entity instance of the supertype is allowed not to belong to any subtype.
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Q 112Q 112
A __________ is the set of all data types and range of values that an attribute can assume.
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Q 113Q 113
A __________ is an assertion or rule that governs the validity of data manipulation operations such as insert,update,and delete.
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Q 114Q 114
Match each of the following terms with its corresponding definition.
a.entity
b.entity type
c.attribute
d.multivalued attribute
e.entity instance
f.supertype
g.subtype
-A single occurrence of an entity type.
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Q 115Q 115
Match each of the following terms with its corresponding definition.
a.entity
b.entity type
c.attribute
d.multivalued attribute
e.entity instance
f.supertype
g.subtype
-A subgrouping of the entities in an entity type that is meaningful to the organization and that shares common attributes or relationships distinct from other subgroupings.
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Q 116Q 116
Match each of the following terms with its corresponding definition.
a.entity
b.entity type
c.attribute
d.multivalued attribute
e.entity instance
f.supertype
g.subtype
-A generic entity type that has a relationship with one or more subtypes.
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Q 117Q 117
Match each of the following terms with its corresponding definition.
a.entity
b.entity type
c.attribute
d.multivalued attribute
e.entity instance
f.supertype
g.subtype
-A named property or characteristic of an entity that is of interest to the organization.
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Short Answer
Q 118Q 118
Match each of the following terms with its corresponding definition.
a.entity
b.entity type
c.attribute
d.multivalued attribute
e.entity instance
f.supertype
g.subtype
-A person,place,object,event or concept in the user environment about which the organization wishes to maintain data.
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Q 119Q 119
Match each of the following terms with its corresponding definition.
a.entity
b.entity type
c.attribute
d.multivalued attribute
e.entity instance
f.supertype
g.subtype
-A collection of entities that share common properties or characteristics.
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Q 120Q 120
Match each of the following terms with its corresponding definition.
a.entity
b.entity type
c.attribute
d.multivalued attribute
e.entity instance
f.supertype
g.subtype
-An attribute that can have more than one value for each entity instance.
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Q 121Q 121
Match each of the following terms with its corresponding definition.
a.unary relationship
b.ternary relationship
c.binary relationship
d.relationship
e.repeating group
f.associative entity
g.disjoint rule
h.overlap rule
i.partial specialization rule
j.total specialization rule
-Specifies that if an entity instance of the supertype is a member of one subtype,it cannot simultaneously be a member of any other subtype.
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Short Answer
Q 122Q 122
Match each of the following terms with its corresponding definition.
a.unary relationship
b.ternary relationship
c.binary relationship
d.relationship
e.repeating group
f.associative entity
g.disjoint rule
h.overlap rule
i.partial specialization rule
j.total specialization rule
-Specifies that an entity instance can simultaneously be a member of two (or more)subtypes.
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Short Answer
Q 123Q 123
Match each of the following terms with its corresponding definition.
a.unary relationship
b.ternary relationship
c.binary relationship
d.relationship
e.repeating group
f.associative entity
g.disjoint rule
h.overlap rule
i.partial specialization rule
j.total specialization rule
-Specifies that an entity instance of the supertype is allowed not to belong to any subtype.
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Short Answer
Q 124Q 124
Match each of the following terms with its corresponding definition.
a.unary relationship
b.ternary relationship
c.binary relationship
d.relationship
e.repeating group
f.associative entity
g.disjoint rule
h.overlap rule
i.partial specialization rule
j.total specialization rule
-Specifies that each entity instance of the supertype must be a member of some subtype in the relationship.
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Short Answer
Q 125Q 125
Match each of the following terms with its corresponding definition.
a.unary relationship
b.ternary relationship
c.binary relationship
d.relationship
e.repeating group
f.associative entity
g.disjoint rule
h.overlap rule
i.partial specialization rule
j.total specialization rule
-A many-to-many (or one-to-one)relationship that the data modeler chooses to model as an entity type with several associated one-to-many relationships with other entity types.
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Q 126Q 126
Match each of the following terms with its corresponding definition.
a.unary relationship
b.ternary relationship
c.binary relationship
d.relationship
e.repeating group
f.associative entity
g.disjoint rule
h.overlap rule
i.partial specialization rule
j.total specialization rule
-A set of two or more multivalued attributes that are logically related.
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Short Answer
Q 127Q 127
Match each of the following terms with its corresponding definition.
a.unary relationship
b.ternary relationship
c.binary relationship
d.relationship
e.repeating group
f.associative entity
g.disjoint rule
h.overlap rule
i.partial specialization rule
j.total specialization rule
-An association between the instances of one or more entity types that is of interest to the organization.
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Short Answer
Q 128Q 128
Match each of the following terms with its corresponding definition.
a.unary relationship
b.ternary relationship
c.binary relationship
d.relationship
e.repeating group
f.associative entity
g.disjoint rule
h.overlap rule
i.partial specialization rule
j.total specialization rule
-A relationship between instances of two entity types.
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Short Answer
Q 129Q 129
Match each of the following terms with its corresponding definition.
a.unary relationship
b.ternary relationship
c.binary relationship
d.relationship
e.repeating group
f.associative entity
g.disjoint rule
h.overlap rule
i.partial specialization rule
j.total specialization rule
-A simultaneous relationship among instances of three entity types.
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Short Answer
Q 130Q 130
Match each of the following terms with its corresponding definition.
a.unary relationship
b.ternary relationship
c.binary relationship
d.relationship
e.repeating group
f.associative entity
g.disjoint rule
h.overlap rule
i.partial specialization rule
j.total specialization rule
-A relationship between the instances of one entity type.
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Short Answer
Q 131Q 131
Match each of the following terms with its corresponding definition.
a.unary relationship
b.ternary relationship
c.binary relationship
d.relationship
e.repeating group
f.associative entity
g.disjoint rule
h.overlap rule
i.partial specialization rule
j.total specialization rule
-The name of the identifier of each entity is underlined on an E-R diagram.
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Q 132Q 132
Match each of the following terms with its corresponding definition.
a.unary relationship
b.ternary relationship
c.binary relationship
d.relationship
e.repeating group
f.associative entity
g.disjoint rule
h.overlap rule
i.partial specialization rule
j.total specialization rule
-To illustrate a multivalued attribute,enclose it in curly brackets.
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Q 133Q 133
Match each of the following terms with its corresponding definition.
a.unary relationship
b.ternary relationship
c.binary relationship
d.relationship
e.repeating group
f.associative entity
g.disjoint rule
h.overlap rule
i.partial specialization rule
j.total specialization rule
-On E-R diagrams,relationships are labeled with verb phrases.
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Short Answer
Q 134Q 134
Match each of the following terms with its corresponding definition.
a.unary relationship
b.ternary relationship
c.binary relationship
d.relationship
e.repeating group
f.associative entity
g.disjoint rule
h.overlap rule
i.partial specialization rule
j.total specialization rule
-To illustrate a multivalued attribute,separate the repeating data into another entity,then using a relationship,link the weak entity to its associated regular entity.
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Q 135Q 135
Match each of the following terms with its corresponding definition.
a.unary relationship
b.ternary relationship
c.binary relationship
d.relationship
e.repeating group
f.associative entity
g.disjoint rule
h.overlap rule
i.partial specialization rule
j.total specialization rule
-A recursive relationship is a relationship between the instances of two entity types.
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Q 136Q 136
Match each of the following terms with its corresponding definition.
a.unary relationship
b.ternary relationship
c.binary relationship
d.relationship
e.repeating group
f.associative entity
g.disjoint rule
h.overlap rule
i.partial specialization rule
j.total specialization rule
-A singular noun is used to name an entity type.
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Short Answer
Q 137Q 137
Match each of the following terms with its corresponding definition.
a.unary relationship
b.ternary relationship
c.binary relationship
d.relationship
e.repeating group
f.associative entity
g.disjoint rule
h.overlap rule
i.partial specialization rule
j.total specialization rule
-Upper- and lower-case letters are used in naming an entity type.
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Q 138Q 138
Match each of the following terms with its corresponding definition.
a.unary relationship
b.ternary relationship
c.binary relationship
d.relationship
e.repeating group
f.associative entity
g.disjoint rule
h.overlap rule
i.partial specialization rule
j.total specialization rule
-An entity instance is a single occurrence of an entity type.
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Q 139Q 139
Match each of the following terms with its corresponding definition.
a.unary relationship
b.ternary relationship
c.binary relationship
d.relationship
e.repeating group
f.associative entity
g.disjoint rule
h.overlap rule
i.partial specialization rule
j.total specialization rule
-Many instances of an entity type are represented by data stored in the database.
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Q 140Q 140
Match each of the following terms with its corresponding definition.
a.business rule
b.disjoint rule
c.overlap rule
d.partial specialization rule
e.total specialization rule
-Specifies that if an entity instance of the supertype is a member of one subtype,it cannot simultaneously be a member of any other subtype.
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Short Answer
Q 141Q 141
Match each of the following terms with its corresponding definition.
a.business rule
b.disjoint rule
c.overlap rule
d.partial specialization rule
e.total specialization rule
-Specifies that an entity instance can simultaneously be a member of two (or more)subtypes.
Free
Short Answer
Q 142Q 142
Match each of the following terms with its corresponding definition.
a.business rule
b.disjoint rule
c.overlap rule
d.partial specialization rule
e.total specialization rule
-Specifies that an entity instance of the supertype is allowed not to belong to any subtype.
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Short Answer
Q 143Q 143
Match each of the following terms with its corresponding definition.
a.business rule
b.disjoint rule
c.overlap rule
d.partial specialization rule
e.total specialization rule
-Specifies that each entity instance of the supertype must be a member of some subtype in the relationship.
Free
Short Answer
Q 144Q 144
Match each of the following terms with its corresponding definition.
a.business rule
b.disjoint rule
c.overlap rule
d.partial specialization rule
e.total specialization rule
-Specifications that preserve the integrity of a conceptual or logical data model.
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Q 145Q 145
Define the following key data modeling terms: entity,attribute,relationship,degree,cardinality,and associative entity.
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Q 149Q 149
What is the role of CASE in conceptual modeling? What information is placed in the CASE repository during conceptual modeling?
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Q 152Q 152
Assume you work for Technology Central,an organization that provides on-site technology seminars for various companies.Identify at least four entities that your company would track.Build a conceptual model.
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