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Ist 210 Chapter 6 Help Guide

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Submitted By Androsszit
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Section 1: True/False Questions (each question has 1.5 pt)
Please circle the correct answer:
1. The ER diagram represents the conceptual database as viewed by the end user.

True False

2. Attributes do not have a domain.

True False

3. Ideally, a primary key is composed of several attributes.

True False

4. Connectivities and cardinalities are established by business rules.

True False

5. Relationship participation is not very important when designing a database.

True False

6. In order to meet performance requirements, you may have to Denormalize portions of the database design.

True False

7. Because a partial dependency can exist only if a table’s primary key is composed of several attributes, a table whose primary key consists of only a single attribute must automatically be in 2NF if it is in 1NF.
True False

8. Normalization produces a lower normal form.
True False

9. Dependencies that are based on only a part of a composite primary key are called transitive dependencies.

True False

10. Relational models view the data as part of a table or collection of tables in which all key values must be identified.

True False
Section 2: Multiple Choice Questions (each question has 2 points)
Note: If more than one choice is selected, it is considered as incorrect

1. Some attributes are classified as ____. a. simple b. complex c. defined d. grouped

2. A relationship is an association between ____. a. objects b. entities c. databases d. fields

3. Cardinality expresses ____ number of entity occurrences associated with one occurrence of the related entity. a. an undetermined b. the specific c. a pre-determined d. a programmed

4. Knowing the ____ number of entity occurrences is very helpful at

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