Deck 2: Database Design Fundamentals

Question 1

Columns are sometimes called tuples.

Answer 1

False

Question 2

You can determine functional dependence by viewing sample data.

Answer 2

False

Question 3

In a relation, the order of the rows and columns is immaterial.

Answer 3

True

Question 4

You can indicate a table's primary key by underlining the column or collection of columns that comprises the primary key for each table in the database.

Question 5

A relation is essentially a three-dimensional table.

Question 6

The same column name can appear in two different tables in a relational database.

Question 7

A tabular database is a collection of tables.

Question 8

The statement "A sales rep's pay class functionally determines his or her pay rate" means that if you know the pay class, you can determine the pay rate.

Question 9

In a relational database, each entity has its own table.

Question 10

Because there is a one-to-many relationship between sales reps and customers in the Premiere Products database, one sales rep can be associated with zero, one, or more customers.

Question 11

Each column in a table of a relational database should have a distinct name.

Question 12

A relation is a characteristic or property of an entity.

Question 13

In the one-to-many type of relationship, the word many always indicates a large number.

Question 14

A matrix is the association between entities.

Question 15

A primary key always comprises a single column.

Question 16

The process of determining the particular tables and columns that will comprise a database is known as database design.

Question 17

In a relation, all values in a column are values of the same attribute.

Question 18

In a relational database, relationships are implemented by having common columns in two or more tables.

Question 19

The concept of functional dependence is trivial to understanding database concepts.

Question 20

A secondary key is the unique identifier for a table.

Question 21

In a relational database each ____ should be unique.

A) row
B) record
C) tuple
D) All of the above

Question 22

It is possible for the computer to generate values that are used as the primary key column.

Question 23

Qualification is an update anomaly.

Question 24

Which of the following symbols is used to qualify column names?

A) period (.)
B) comma (,)
C) backslash (/)
D) pound sign (#)

Question 25

There is a commonly accepted shorthand representation to show the structure of a relational database: After the name of the table, all the columns in the table are listed within a set of ____.

A) square brackets
B) parentheses
C) back slashes
D) curly braces

Question 26

A(n) ____ is a characteristic or property of an entity.

A) field
B) attribute
C) column
D) All of the above

Question 27

A table is in third normal form if it is in second normal form and no nonkey column is dependent on only a portion of the primary key.

Question 28

If a table contained both employee numbers and Social Security numbers, both columns would be referred to as candidate keys.

Question 29

When you convert an unnormalized table to a table in first normal form, the primary key of the table in first normal form is usually the concatenation of at least two columns.

Question 30

A field is another term for a(n) ____.

A) tuple
B) row
C) column
D) entity

Question 31

At Premiere Products, there is a ____ relationship between sales reps and customers.

A) one-to-one
B) one-to-two
C) one-to-many
D) many-to-many

Question 32

A programmer interviews users, examines existing and proposed documents, and examines organizational policies to determine exactly the type of data needs the database must support.

Question 33

An unnormalized relation is a relation that may contain repeating groups.

Question 34

A record is another term for a(n) ____.

A) row
B) field
C) attribute
D) property

Question 35

Normalization is done before creating the database design.

Question 36

The definition for a primary key really defines a candidate key as well.

Question 37

The process of determining the particular tables and columns that will comprise a database is known as ____.

A) normalization
B) database design
C) qualification
D) relational management

Question 38

A determinant is any column (or collection of columns) that determines another table.

Question 39

A(n) ____ is the association between entities.

A) qualification
B) functional dependency
C) relationship
D) join

Question 40

Many organizations and institutions are moving toward using Social Security numbers as primary keys because of privacy issues.

Question 41

A ____ column is a column that is not part of the primary key.

A) determinant
B) candidate
C) functional
D) nonkey

Question 42

When you write a column in the format CUSTOMER.REP_NUM, you say that you ____________________ the column name.

Question 43

A(n) ____________________ is another name for a record or a row.

Question 44

A relation is in ____ if it does not contain any repeating groups.

A) first normal form
B) second normal form
C) third normal form
D) Boyce-Codd normal form

Question 45

A relationship is an association between ____________________.

Question 46

Any column (or collection of columns) that determines another column is called a(n) ____.

A) nonkey column
B) primary key
C) dependency
D) determinant

Question 47

In an entity-relationship (E-R) diagram, one-to-many relationships between entitities are drawn as ____.

A) ovals
B) equal signs
C) lines
D) circles

Question 48

A table's design should be as simple as possible; you should restrict each position in a table to a single entry by not allowing multiple entries (called a(n) ____________________ group) in an individual location in the table.

Question 49

In an entity-relationship (E-R) diagram, ____ are used to represent an entity.

A) rectangles
B) ovals
C) circles
D) diamonds

Question 50

When you combine a column name with a table name, you are said to ____________________ the column name.

Question 51

____ is the duplication of data.

A) Repeating group
B) Redundancy
C) Replication
D) Anomaly

Question 52

In this text, Boyce-Codd normal form is the same as ____.

A) unnormalized
B) first normal form
C) second normal form
D) third normal form

Question 53

Which of the following is the primary key of the ORDER_LINE (ORDER_NUM, PART_NUM, NUM_ORDERED, QUOTED_PRICE) table?

A) ORDER_NUM
B) PART_NUM
C) QUOTED_PRICE
D) ORDER_NUM and PART_NUM

Question 54

____ is one of the categories of update anomalies.

A) Functional dependence
B) Functional splitting
C) Inconsistent data
D) Qualification

Question 55

In a relation, the ____________________ of the rows and columns is immaterial.

Question 56

A(n) ____________________ is the association between entities.

Question 57

____ is the formal term for combining two or more columns to form a primary key.

A) Qualification
B) Joining
C) Normalization
D) Concatenation

Question 58

____ can occur when there is a column in a table that is dependent on only a portion of the primary key.

A) Qualification
B) Update anomalies
C) Function splitting
D) Determination

Question 59

A(n) ____________________ is a person, place, thing, or event for which you want to store and process data.

Question 60

A relational database is a collection of ____________________.

Question 61

In one style of entity-relationship (E-R) diagrams, the letter n is used to represent the ____________________ side of a relationship.

Question 62

In one style of entity-relationship (E-R) diagrams, a crow's foot is used to represent the ____________________ side of a relationship.

Question 63

The four categories of update anomalies are additions, deletions, inconsistent data, and ____________________.

Question 64

In one style of entity-relationship (E-R) diagrams, diamonds are used to describe ____________________.

Question 65

The ____________________ key of a table (relation) is the column or collection of columns that uniquely identifies a given row in that table.

Question 66

How does a DBMS that follows the relational model handle entities, attributes of entities, and relationships between entities?

Question 67

______________________________ is another name given to third normal form in this text.

Question 68

A(n) ____________________ column is a column that is not part of the primary key.

Question 69

What are the six steps necessary to design a database for a set of requirements?

Question 70

If B is functionally dependent on A, you also can say that A functionally ____________________ B.

Question 71

Define a relation.

Question 72

If the primary key of a table contains only a single column, the table is automatically in ____________________ normal form.

Question 73

In a relational database, column B is ____________________ on another column A, if at any point in time a value for A determines a single value for B.

Question 74

A relation is in ____________________ normal form if it does not contain any repeating groups.

Question 75

What is the precise definition of a primary key?