1. Data modeling facilitates communication through Select one: a. Data model and

Question

1. Data modeling facilitates communication through

Select one:

a. Data model and metadata

b. Logical database design

c. Logical and physical schemas

d. Physical database design and definition

e. Systems Development Lifecycle

2. A specific item of data, such as the name "Diane" is

Select one:

a. Attribute

b. Cardinality

c. Degree

d. Instance

e. Relationship

f. Strong entity

g. Weak entity

3. A generic entity that is subdivided into several specialized entity is

Select one:

a. Disjointed

b. Subtype

c. Supertype

d. Violation of modeling rules

4. If you find that a relationship has attributes, you should consider converting the relationship

Select one:

a. An associative entity

b. An attribute-to-attribute relationship

c. A constraint

d. An identifier

e. A supertype/suptype relationship

Explanation / Answer

1.

Data models and metadata are used for formalization, communication and scope.

Communication involves people, business and training.

Thus, the correct answer is a. Data model and metadata.

2.

In database management system entity has data component these component are called as the attributes. Attributes can be name, address, etc.

Thus, the correct answer is a. Attribute

3.

Supertype can be used to determine the subtype. Supertype are generic and has relationship with the corresponding subtype.

Thus, the correct answer is c. Supertype

4.

Thus, the correct answer is a. An associative entity

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