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Chapter 2 (True/False)

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asdf Quiz on Chapter 2 (True/False), created by . . on 30/08/2016.
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Quiz by . ., updated more than 1 year ago
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Created by . . over 7 years ago
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Resource summary

Question 1

Question
A data model is usually graphical.
Answer
  • True
  • False

Question 2

Question
2. An implementation-ready data model needn't necessarily contain enforceable rules to guarantee the integrity of the data.
Answer
  • True
  • False

Question 3

Question
3. An implementation-ready data model should contain a description of the data structure that will store the end-user data.
Answer
  • True
  • False

Question 4

Question
4. Within the database environment, a data model represents data structures with the purpose of supporting a specific problem domain.
Answer
  • True
  • False

Question 5

Question
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.
Answer
  • True
  • False

Question 6

Question
6. In the context of data models, an entity is a person, place, thing, or event about which data will be collected and stored.
Answer
  • True
  • False

Question 7

Question
7. Database designers determine the data and information that yield the required understanding of the entire business.
Answer
  • True
  • False

Question 8

Question
8. Business rules apply to businesses and government groups, but not to other types of organizations such as religious groups or research laboratories.
Answer
  • True
  • False

Question 9

Question
9. Business rules must be rendered in writing.
Answer
  • True
  • False

Question 10

Question
10. In an SQL-based relational database, each table is dependent on every other table.
Answer
  • True
  • False

Question 11

Question
11. In an SQL-based relational database, rows in different tables are related based on common values in common attributes
Answer
  • True
  • False

Question 12

Question
12. A disadvantage of the relational database management system (RDBMS) is its inability to hide the complexities of the relational model from the user.
Answer
  • True
  • False

Question 13

Question
13. Each row in the relational table is known as an entity instance or entity occurrence in the ER model.
Answer
  • True
  • False

Question 14

Question
14. In Chen notation, entities and relationships have to be oriented horizontally; not vertically.
Answer
  • True
  • False

Question 15

Question
15. M:N relationships are not appropriate in a relational model.
Answer
  • True
  • False

Question 16

Question
16. Today, most relational database products can be classified as object/relational.
Answer
  • True
  • False

Question 17

Question
17. The network model has structural level dependence.
Answer
  • True
  • False

Question 18

Question
18. The external model is the representation of the database as “seen” by the DBMS.
Answer
  • True
  • False

Question 19

Question
19. The hierarchical model is software-independent.
Answer
  • True
  • False

Question 20

Question
20. The relational model is hardware-dependent and software-independent.
Answer
  • True
  • False
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