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level: Level 2

Questions and Answers List

level questions: Level 2

QuestionAnswer
What are the three types of data models?Conceptual data model Logical data model Physical data model
What are the five data model building blocks?Entities Attributes Relationship Constraint Business rules
What are the two different types of an entity?Strong entity Weak entity
What are the five types of attributes?Simple attributes Composite attributes Derived attributes Single-value attributes Multi-value attributes
What are the three degrees of a relationship?Unary (degree 1) Binary (degree 2) Ternary (degree 3)