Multiple choices: 8. A car\'s color is an example of a ________. a. multivalued
ID: 3904436 • Letter: M
Question
Multiple choices:
8. A car's color is an example of a ________.
a. multivalued attribute
b. derived attribute
c. single-valued attribute
d. simple attribute
15. In the Chen notation, ________.
a. multivalued attributes are shown by a solid line connecting an attribute to an entity
b. the implementation-oriented approach is favored
c. the database representation consumes lesser space than the Crow's Foot notation
d. the cardinalities are placed on the side of the related entity
19. In the Crow's Foot modeling notation, ________.
a. cardinalities are placed next to the entity to which they apply
b. associative entities are identified as weak relationships
c. specific cardinalities and numeric cardinality range are depicted on the entity relationship diagram
d. weak relationships are depicted by placing a solid relationship line between the entities
20. A weak entity is one that ________.
a. has a foreign key attribute that can be null
b. inherits a part of its primary key from its counterpart in a relationship
c. can exist without the entity with which it has a relationship
d. has a primary key that is not derived from the parent entity in a relationship
21. A ________ can exist apart from one or more related entities
a. weak entity
b. regular entity
c. associative entity
29. As an important part of the job, a ________ is responsible to make sure that all appropriate business rules are identified.
a. database designer
b. database administrator
c. end user
d. system analyst
33. An entity is assumed to exist in a mandatory relationship with a related entity if ________.
a. the relationship is an identifying relationship
b. no optionality symbol is depicted with the entity
c. the relationship is a weak relationship
d. the minimum cardinality is 0 for the mandatory entity
These are the questions that I am struggling with. Database class.
Explanation / Answer
8.
A car's color is an example of a multivalued attribute.
Option a
15.
In the Chen notation, the database representation consumes lesser space than the Crow's Foot notation.
Option c
19.
In the Crow's Foot modeling notation, cardinalities are placed next to the entity to which they apply.
Option a
20.
A weak entity is one that inherits a part of its primary key from its counterpart in a relationship.
Option b
21.
A regular entiy can exist apart from one or more related entities.
Option b
29.
As an important part of the job, a database designer is responsible to make sure that all appropriate business rules are identified.
Option a
33.
An entity is assumed to exist in a mandatory relationship with a related entity if the minimum cardinality is 0 for the mandatory entity.
Option d
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