August 2009
Intermediate to advanced
893 pages
26h 48m
English
Content preview from Database Systems: Concepts, Design and Applications
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State True/False
| 1. | E-R model was first introduced by Dr. E.F. Codd. |
| 2. | E-R modelling is a high-level conceptual data model developed to facilitate database design. |
| 3. | E-R model is dependent on a particular database management system (DBMS) and hardware platform. |
| 4. | A binary relationship exists when an association is maintained within a single entity. |
| 5. | A weak entity type is independent on the existence of another entity. |
| 6. | An entity type is a group of objects with the same properties, which are identified by the enterprise as having an independent existence. |
| 7. | An entity occurrence is also called entity instance. |
| 8. | An entity instance is a uniquely identifiable object of an entity type. |
| 9. | A relationship is an association among two or more entities ... |
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