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Questão 1
Questão
A data model is usually graphical.
Responda
- True
- False
Questão 2
Questão
2. An implementation-ready data model needn't necessarily contain enforceable rules to guarantee the integrity of the data.
Responda
- True
- False
Questão 3
Questão
3. An implementation-ready data model should contain a description of the data structure that will store the end-user data.
Responda
- True
- False
Questão 4
Questão
4. Within the database environment, a data model represents data structures with the purpose of supporting a specific problem domain.
Responda
- True
- False
Questão 5
Questão
5. Even when a good database blueprint is available, an applications programmer’s view of the data should match that of the manager and the end user.
Responda
- True
- False
Questão 6
Questão
6. In the context of data models, an entity is a person, place, thing, or event about which data will be collected and stored.
Responda
- True
- False
Questão 7
Questão
7. Database designers determine the data and information that yield the required understanding of the entire business.
Responda
- True
- False
Questão 8
Questão
8. Business rules apply to businesses and government groups, but not to other types of organizations such as religious groups or research laboratories.
Responda
- True
- False
Questão 9
Questão
9. Business rules must be rendered in writing.
Responda
- True
- False
Questão 10
Questão
10. In an SQL-based relational database, each table is dependent on every other table.
Responda
- True
- False
Questão 11
Questão
11. In an SQL-based relational database, rows in different tables are related based on common values in common attributes
Responda
- True
- False
Questão 12
Questão
12. A disadvantage of the relational database management system (RDBMS) is its inability to hide the complexities of the relational model from the user.
Responda
- True
- False
Questão 13
Questão
13. Each row in the relational table is known as an entity instance or entity occurrence in the ER model.
Responda
- True
- False
Questão 14
Questão
14. In Chen notation, entities and relationships have to be oriented horizontally; not vertically.
Responda
- True
- False
Questão 15
Questão
15. M:N relationships are not appropriate in a relational model.
Responda
- True
- False
Questão 16
Questão
16. Today, most relational database products can be classified as object/relational.
Responda
- True
- False
Questão 17
Questão
17. The network model has structural level dependence.
Responda
- True
- False
Questão 18
Questão
18. The external model is the representation of the database as “seen” by the DBMS.
Responda
- True
- False
Questão 19
Questão
19. The hierarchical model is software-independent.
Responda
- True
- False
Questão 20
Questão
20. The relational model is hardware-dependent and software-independent.
Responda
- True
- False
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