Quiz
ICS121 ch3
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Perguntas do quiz (16)
1[blank_start]Attribute Inheritance[blank_end] - Subtype entities inherit vales of all attributes of the supertype.
- AAttribute Inheritance
2[blank_start]Completeness Constraint[blank_end] - Wheter an instance of a supertype must also be a member of at least one subtype.
- ACompleteness Constraint
3[blank_start]Disjoint rule[blank_end] - An instance of the supertype can be only one of the subtypes.
- ADisjoint rule
4[blank_start]Disjointness constraint[blank_end] - whether an instance of a supertype may simultaneously be a member of two or more subtypes.
- ADisjointness constraint
5[blank_start]Enhanced E-R model[blank_end] - extends original E-R model with new modeling constructs.
- AEnhanced E-R model
6[blank_start]Entity cluster[blank_end] - set of one or more entity tpes and associated relationshipsgrouped into a single abstract entity type.
- AEntity cluster
7[blank_start]Generalization[blank_end] - the process of defining a more general entity type from a set more specialized entity types( BOTTOM UP)
- AGeneralization
8[blank_start]Overlap rule[blank_end] - an instance of the super type could be more than one of the subtypes.
- AOverlap rule
9[blank_start]Partial specialization rule[blank_end] - NO (SINGLE LINE)
- APartial specialization rule
10[blank_start]Specialization[blank_end]- The process of defining one or more subtypes of the supertype and forming supertype/subtype relationships(TOP DOWN)
- ASpecialization
11[blank_start]Subtype[blank_end] - A subgrouping of the entities in an entity type that has attributes distinct from those in other subgroupings.
- ASubtype
12[blank_start]Subtype discriminator[blank_end]- an attribute of the supertype whose values determine the target subtypes.
- ASubtype discriminator
13[blank_start]Supertype[blank_end] - A generic entity type that has a relationship with one or more subtypes.
- ASupertype
14[blank_start]Total specialization rule[blank_end] - YES ( DOUBLE LINE)
- ATotal specialization rule
15[blank_start]Universal data model[blank_end] - A generic or template data model that can be reusedas a starting point for a data modeling project ( also called a "pattern")
- AUniversal data model
16Supertype/Subtype Hierarchy - [blank_start]?[blank_end]
- A?
Informações
- Descrição
- Quiz sobre ICS121 ch3, criado por 2014068629 em 08-10-2015.
- Autor
- 2014068629
- Idioma
- English
- Visualizações
- 1
- Avaliação
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