Deck 2: Modeling Data in the Organization

Question 1

Business policies and rules govern all of the following EXCEPT:

A) managing employees.
B) creating data.
C) updating data.
D) removing data.

Answer 1

A

Question 2

A person's name, birthday, and social security number are all examples of:

A) attributes.
B) entities.
C) relationships.
D) descriptors.

Answer 2

A

Question 3

An entity type whose existence depends on another entity type is called a ________ entity.

A) strong
B) weak
C) codependent
D) variant

Answer 3

B

Question 4

The logical representation of an organization's data is called a(n):

A) database model.
B) entity-relationship model.
C) relationship systems design.
D) database entity diagram.

Question 5

A property or characteristic of an entity type that is of interest to the organization is called a(n):

A) attribute.
B) coexisting entity.
C) relationship.
D) cross-function.

Question 6

A(n) ________ is the relationship between a weak entity type and its owner.

A) member chain
B) identifying relationship
C) jump path
D) chain link

Question 7

Data modeling may be the most important part of the systems development process because:

A) data characteristics are important in the design of programs and other systems components.
B) the data in a system are generally less complex than processes and play a central role in development.
C) data are less stable than processes.
D) it is the easiest.

Question 8

An attribute that must have a value for every entity (or relationship) instance is a(n):

A) composite attribute.
B) required attribute.
C) optional attribute.
D) multivalued attribute.

Question 9

A good data definition will describe all of the characteristics of a data object EXCEPT:

A) subtleties.
B) examples.
C) who determines the value of the data.
D) who can delete the data.

Question 10

An attribute of an entity that must have a value for each entity instance is a(n):

A) optional attribute.
B) composite attribute.
C) required attribute.
D) fuzzy attribute.

Question 11

The most common types of entities are:

A) strong entities.
B) weak entities.
C) associative entities.
D) smush entities.

Question 12

Which of the following is an entity that exists independently of other entity types?

A) Codependent
B) Weak
C) Strong
D) Variant

Question 13

Customers, cars, and parts are examples of:

A) entities.
B) attributes.
C) cardinals.
D) relationships.

Question 14

An entity type name should be all of the following EXCEPT:

A) concise.
B) specific to the organization.
C) as short as possible.
D) a singular noun.

Question 15

A ________ defines or constrains some aspect of the business.

A) business constraint
B) business structure
C) business control
D) business rule

Question 16

Which of the following is NOT a good characteristic of a data name?

A) Relates to business characteristics
B) Readable
C) Repeatable
D) Relates to a technical characteristic of the system

Question 17

A fact is an association between two or more:

A) words.
B) terms.
C) facts.
D) nuggets.

Question 18

Which of the following is NOT a characteristic of a good business rule?

A) Declarative
B) Atomic
C) Inconsistent
D) Expressible

Question 19

In an E-R diagram, there are/is ________ business rule(s) for every relationship.

A) two
B) three
C) one
D) zero

Question 20

The following figure shows an example of:

A) a one-to-many relationship.
B) a strong entity and its associated weak entity.
C) a co-dependent relationship.
D) a double-walled relationship.

Question 21

Which of the following criteria should be considered when selecting an identifier?

A) Choose an identifier that is not stable.
B) Choose a null identifier.
C) Choose an identifier that doesn't have large composite attributes.
D) Choose the most complex identifier possible.

Question 22

A ________ specifies the number of instances of one entity that can be associated with each instance of another entity.

A) degree
B) cardinality constraint
C) counter constraint
D) limit

Question 23

The number of entity types that participate in a relationship is called the:

A) number.
B) identifying characteristic.
C) degree.
D) counter.

Question 24

The following figure shows an example of:

A) a composite attribute.
B) a relational attribute.
C) a derived attribute.
D) a multivalued attribute.

Question 25

A mutually exclusive relationship is one in which:

A) an entity instance can participate in many different relationships.
B) an entity instance can participate in only one of several alternative relationships.
C) an entity instance cannot participate in a relationship with another entity instance.
D) an entity instance bridges other XML documents.

Question 26

A relationship between the instances of a single entity type is called a ________ relationship.

A) ternary
B) primary
C) binary
D) unary

Question 27

An entity that associates the instances of one or more entity types and contains attributes specific to the relationships is called a(n):

A) associative entity.
B) build entity.
C) gateway entity.
D) smush entity.

Question 28

An attribute that can be broken down into smaller parts is called a(n) ________ attribute.

A) associative
B) simple
C) composite
D) complex

Question 29

An attribute that uniquely identifies an entity and consists of a composite attribute is called a(n):

A) composite attribute.
B) composite identifier.
C) identifying attribute.
D) relationship identifier.

Question 30

The number of entity types that participate in a Unary relationship is:

A) zero.
B) one.
C) two.
D) three.

Question 31

In the following diagram, what type of relationship is depicted?

A) Unary
B) Binary
C) Ternary
D) Quad

Question 32

A relationship where the minimum and maximum cardinality are both one is a(n) ________ relationship.

A) optional
B) unidirectional
C) mandatory link
D) mandatory one

Question 33

A simultaneous relationship among the instances of three entity types is called a ________ relationship.

A) ternary
B) tertiary
C) primary
D) binary

Question 34

In the figure below, which attribute is multivalued?

A) Years_Employed
B) Employee_ID
C) Skill
D) Address

Question 35

An attribute that can be calculated from related attribute values is called a ________ attribute.

A) simple
B) composite
C) multivalued
D) derived

Question 36

For the relationship represented in the figure below, which of the following is true?

A) An employee can work in more than one department but does not have to work for any department.
B) A department must have at least one employee.
C) A department can have more than one employee.
D) An employee has to work for more than one department.

Question 37

In the figure below, which attribute is derived?

A) Years_Employed
B) Employee_ID
C) Skill
D) Address

Question 38

In the figure shown below, which of the following is true?

A) A person can marry at most one person.
B) A person has to be married.
C) A person can marry more than one person, but that person can only be married to one person.
D) A person can marry more than one person.

Question 39

The total quiz points for a student for an entire semester is a(n) ________ attribute.

A) derived
B) mixed
C) stored
D) addressed

Question 40

In the following diagram, which is true?

A) It depicts a ternary relationship.
B) It depicts a many-to-many relationship.
C) Item represents a column.
D) BOM_STRUCTURE represents a row.

Question 41

A business rule is a statement that defines or constrains some aspect of the business.

Question 42

In the figure shown below, which of the following business rules would apply?

A) Each vendor can supply many parts to any number of warehouses, but need not supply any parts.
B) Each part must be supplied by exactly one vendor to any number of warehouses.
C) Each warehouse can be supplied with any number of parts from more than one vendor, and each warehouse could be supplied with no parts.
D) VENDOR is not allowed.

Question 43

A business rule is a statement of how a policy is enforced or conducted.

Question 44

The intent of a business rule is to break down business structure.

Question 45

While business rules are not redundant, a business rule can refer to another business rule.

Question 46

An example of a term would be the following sentence: "A student registers for a course."

Question 47

One of the roles of a database analyst is to identify and understand rules that govern data.

Question 48

An entity is a person, place, object, event, or concept in the user environment about which the organization wishes to maintain data.

Question 49

Enforcement of business rules can be automated through the use of software tools that can interpret the rules and enforce them.

Question 50

A business rule should be internally consistent.

Question 51

Business rules are formulated from a collection of business ramblings.

Question 52

In the following diagram, which of the answers below is true?

A) Each patient has one or more patient histories.
B) Each patient has one and only one visit.
C) Each patient history belongs to zero and one patient.
D) Each patient history belongs to many patients.

Question 53

Data names should always relate to business characteristics.

Question 54

A fact is an association between two or more terms.

Question 55

A value that indicates the date or time of a data value is called a:

A) value stamp.
B) time stamp.
C) checkpoint.
D) check counter.

Question 56

A good data definition is always accompanied by diagrams, such as the entity-relationship diagram.

Question 57

The E-R model is used to construct a conceptual model.

Question 58

When systems are automatically generated and maintained, quality is diminished.

Question 59

In the following diagram, which answer is true?

A) Each employee can supervise one employee, no employees or many employees.
B) Each employee can manage many departments.
C) Each employee works in more than one department.
D) Each employee was fired.

Question 60

A student can attend five classes, each with a different professor. Each professor has 30 students. The relationship of students to professors is a ________ relationship.

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

Question 61

A single occurrence of an entity is called an entity instance.

Question 62

A simple attribute can be broken down into smaller pieces.

Question 63

When choosing an identifier, choose one that will not change its value often.

Question 64

Some examples of attributes are: eye_color, weight, student_id, STUDENT.

Question 65

Most systems developers believe that data modeling is the least important part of the systems development process.

Question 66

The purpose of data modeling is to document business rules about processes.

Question 67

An attribute whose values can be calculated from related attribute values is called a derived attribute.

Question 68

An entity type name should always be a singular noun.

Question 69

A multivalued attribute may take on more than one value for a particular entity instance.

Question 70

Participation in a relationship may be optional or mandatory.

Question 71

An entity type on which a strong entity is dependent is called a covariant entity.

Question 72

Data modeling is about documenting rules and policies of an organization that govern data.

Question 73

Data names do not have to be unique.

Question 74

The relationship between a weak entity type and its owner is an identifying relationship.

Question 75

In an E-R diagram, strong entities are represented by double-walled rectangles.

Question 76

In the figure below, Name would be an ideal identifier.

Question 77

Relationships represent action being taken using a verb phrase.

Question 78

The name used for an entity type should never be the same in other E-R diagrams on which the entity appears.

Question 79

Data, rather than processes, are the most complex aspects of many modern information systems.

Question 80

In an E-R diagram, an associative entity is represented by a rounded rectangle.