Database Test 4 Computer Subject
Database Test 4 Computer Subject
Question 21
Which of the following refers to an attribute whose maximum cardinality is 1?
A single-value attribute has a maximum cardinality of 1.
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Question 22
Which of the following refers to a simple or group attribute?
Nonobject attributes include simple or group attributes that are not objects.
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Question 23
Which are the three types of domains?
The three types of domains are simple, group, and semantic.
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Question 24
The process of developing a set of object diagrams is?
Object diagrams are typically developed using an iterative process.
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Question 25
One field or combination of fields for which more than one record may have the same combination of values is called _____?
A secondary key allows multiple records to share the same value, unlike a primary key which must be unique.
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Question 26
A candidate key is _____?
A candidate key is an attribute or combination of attributes that can potentially serve as the primary key of a table.
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Question 27
An attribute in a relation of a database that serves as the primary key of another relation in the same database is called a _____?
A foreign key is an attribute in one table that refers to the primary key in another table, establishing a relationship between them.
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Question 28
A primary key that consists of more than one attribute is called a _____?
A composite key is a primary key composed of two or more attributes used together to uniquely identify a record.
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Question 29
For each attribute of a relation, there is a set of permitted values, called the _____ of that attribute.
The domain of an attribute defines the set of permissible values for that attribute.
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Question 30
A domain is atomic if elements of the domain are considered to be _____ units.
An atomic domain consists of indivisible units, meaning each value cannot be further decomposed.
