level: Level 2
Questions and Answers List
level questions: Level 2
| Question | Answer |
|---|---|
| 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) |