Deck 12: Designing Data-Bases-Apply Your Knowledge-Glossary

Question 1

What has the potential to contain more than one value for an attribute?

A)single-valued attribute
B)multivalued attribute
C)null-valued attribute
D)All of these are correct.

Answer 1

B
Explanation: This is the definition of a multivalued attribute.

Question 2

Date of birth would be a stored attribute.

Answer 2

True
Explanation: Date of birth would be a stored attribute

Question 3

A one-to-many relationship occurs between two entities in which an instance of one entity can be related to only one instance of a related entity.

Answer 3

False
Explanation: A one-to-one relationship occurs between two entities in which an instance of one entity can be related to only one instance of a related entity.

Question 4

What kind of attribute can be calculated using the value of another attribute?

A)single-valued attribute
B)multivalued attribute
C)derived attribute
D)stored attribute

Question 5

A primary key is a field that uniquely identifies a given record in a table.

Question 6

What kind of attribute would be given for a person who does not have an email address?

A)null-valued attribute
B)multivalued attribute
C)single-valued attribute
D)stored attribute

Question 7

What occurs between two entities in which an instance of one entity can be related to many instances of a related entity?

A)one-to-one relationship
B)one-to-many relationship
C)many-to-many relationship
D)composite entity

Question 8

What kind of attribute would be date of birth?

A)null-valued attribute
B)multivalued attribute
C)derived attribute
D)stored attribute

Question 9

A foreign key is a primary key of one table that appears as an attribute in another table and acts to provide a logical relationship between the two tables.

Question 10

Which of the following is a possible business rule?

A)a customer can purchase many DVDs
B)DVDs can be purchased by many customers
C)a DVD title can have many copies
D)All of these are correct.

Question 11

Which of the following statements is accurate?

A)A correct business rule for one organization may not be correct for another organization.
B)Each business rule will have entities and sometimes even attributes.
C)A typical business may have hundreds of business rules.
D)All of these are correct.

Question 12

What is a statement that defines an aspect of a business?

A)attribute
B)entity
C)business relational diagram
D)business rule

Question 13

What occurs when two entities can be related to each other in many instances?

A)one-to-one relationship
B)one-to-many relationship
C)many-to-many relationship
D)composite entity

Question 14

What kind of attribute is assigned to an attribute when no other value applies or when a value is unknown?

A)single-valued attribute
B)multivalued attribute
C)derived attribute
D)null-valued attribute

Question 15

What kind of attribute would be age?

A)null-valued attribute
B)multivalued attribute
C)derived attribute
D)stored attribute

Question 16

A field is composed of rows and columns that represent an entity.

Question 17

What is a technique for documenting the entities and relationships in a database environment?

A)entity-relationship diagram
B)data model
C)database
D)relational database model

Question 18

What occurs between two entities in which an instance of one entity can be related to only one instance of a related entity?

A)one-to-one relationship
B)one-to-many relationship
C)many-to-many relationship
D)composite entity

Question 19

What has only a single value of each attribute of an entity?

A)single-valued attribute
B)multivalued attribute
C)null-valued attribute
D)All of these are correct.

Question 20

Which of the following is a type of attribute?

A)single-valued attribute
B)multivalued attribute
C)null-valued attribute
D)All of these are correct.

Question 21

What exists to represent the relationship between two other entities?

A)one-to-one relationship
B)one-to-many relationship
C)many-to-many relationship
D)composite entity

Question 22

What expresses the specific number of instances in an entity?

A)cardinality
B)composite entity
C)business rule
D)null-valued attribute

Question 23

What is a foreign key?

A)a field that uniquely identifies a given record in a table
B)a primary key of one table that appears as an attribute in another table and acts to provide a logical relationship between the two tables
C)a table that uniquely identifies a given record in a field
D)a foreign key of one table that appears as an entity in another table and acts to provide a logical relationship between the two records

Question 24

What is composed of rows and columns that represent an entity?

A)field
B)table
C)record
D)key

Question 25

What is a collection of related data elements?

A)field
B)table
C)record
D)key

Question 26

What is a primary key?

A)a field that uniquely identifies a given record in a table
B)a primary key of one table that appears as an attribute in another table and acts to provide a logical relationship between the two tables
C)a table that uniquely identifies a given record in a field
D)a foreign key of one table that appears as an entity in another table and acts to provide a logical relationship between the two records

Question 27

What is a characteristic of a table?

A)field
B)table
C)record
D)key