WGU C175 UPDATED Exam Questions
and CORRECT Answers
Flat Files - CORRECT ANSWER - a file having no internal hierarchy
Hashed Files - CORRECT ANSWER - A file that has been encrypted for security
purposes.
Heap File - CORRECT ANSWER - An unsorted set of records.
Information - CORRECT ANSWER - The transformation of raw data into useful facts.
Punch Card - CORRECT ANSWER - A card that is perforated and can hold commands or
data.
Structured Data - CORRECT ANSWER - Information with a high degree of organization.
Unstructured Data - CORRECT ANSWER - Information that does not have structure
(such as text)
Binary Relationship - CORRECT ANSWER - A relationship between two entity types.
Unary Relationship - CORRECT ANSWER - An associate occurrence of an entity type
with other occurrences of the same entity type.
Cardinality - CORRECT ANSWER - The maximum number of entities that can be
involved in a particular relationship.
E-R Model
,*E-R = Entity - Relationship - CORRECT ANSWER - Diagram of entities together with
their attributes and the relationship among them.
Intersection Data - CORRECT ANSWER - It is data that describes a many-to-many
relationship.
Modality - CORRECT ANSWER - It is a minimum number of entity occurrences that can
be involved in a relationship.
One-to-one Binary Relationship - CORRECT ANSWER - It means that a single
occurrence of one entity type can be associated with a single occurrence of the other entity type
and vice versa.
Ternary Relationship - CORRECT ANSWER - Involves three different entity types.
Unique identifier - CORRECT ANSWER - It is used to uniquely identify each record in a
database table.
Attribute - CORRECT ANSWER - A property, characteristic, or fact that we know about
an entity.
"A salesperson works in one office."
What is the name of this relationship? - CORRECT ANSWER - One-to-one binary
relationship
"A salesperson sells to many customers."
, What is the name of this relationship? - CORRECT ANSWER - One-to-many binary
relationship
"A salesperson is authorized to sell many products, and a product can be sold by many
salespersons."
What is the name of this relationship? - CORRECT ANSWER - Many-to-many binary
relationship
What is the positioning and meaning for Cardinality and Modality on an E-R model? -
CORRECT ANSWER - Cardinality is the outer symbol; represents the maximum.
Modality is the inner symbol; represents the minimum.
"A salesperson works in a minimum of one and a maximum of one office, and an office may be
occupied by or assigned to a minimum of zero and a maximum of one salesperson." - CORRECT
ANSWER -
"A salesperson may have no customers or many customers." - CORRECT ANSWER -
Describe the ER model for "Each salesperson is authorized to sell to at least one or many
products, and each product can be sold by at least one or many salespeople." - CORRECT
ANSWER -
"One salesperson backs-up another salesperson."
What is the name of this model? - CORRECT ANSWER - One-to-one unary relationship
"A salesperson manages zero to many other salespersons, and a salesperson is managed by
exactly one other salesperson."
and CORRECT Answers
Flat Files - CORRECT ANSWER - a file having no internal hierarchy
Hashed Files - CORRECT ANSWER - A file that has been encrypted for security
purposes.
Heap File - CORRECT ANSWER - An unsorted set of records.
Information - CORRECT ANSWER - The transformation of raw data into useful facts.
Punch Card - CORRECT ANSWER - A card that is perforated and can hold commands or
data.
Structured Data - CORRECT ANSWER - Information with a high degree of organization.
Unstructured Data - CORRECT ANSWER - Information that does not have structure
(such as text)
Binary Relationship - CORRECT ANSWER - A relationship between two entity types.
Unary Relationship - CORRECT ANSWER - An associate occurrence of an entity type
with other occurrences of the same entity type.
Cardinality - CORRECT ANSWER - The maximum number of entities that can be
involved in a particular relationship.
E-R Model
,*E-R = Entity - Relationship - CORRECT ANSWER - Diagram of entities together with
their attributes and the relationship among them.
Intersection Data - CORRECT ANSWER - It is data that describes a many-to-many
relationship.
Modality - CORRECT ANSWER - It is a minimum number of entity occurrences that can
be involved in a relationship.
One-to-one Binary Relationship - CORRECT ANSWER - It means that a single
occurrence of one entity type can be associated with a single occurrence of the other entity type
and vice versa.
Ternary Relationship - CORRECT ANSWER - Involves three different entity types.
Unique identifier - CORRECT ANSWER - It is used to uniquely identify each record in a
database table.
Attribute - CORRECT ANSWER - A property, characteristic, or fact that we know about
an entity.
"A salesperson works in one office."
What is the name of this relationship? - CORRECT ANSWER - One-to-one binary
relationship
"A salesperson sells to many customers."
, What is the name of this relationship? - CORRECT ANSWER - One-to-many binary
relationship
"A salesperson is authorized to sell many products, and a product can be sold by many
salespersons."
What is the name of this relationship? - CORRECT ANSWER - Many-to-many binary
relationship
What is the positioning and meaning for Cardinality and Modality on an E-R model? -
CORRECT ANSWER - Cardinality is the outer symbol; represents the maximum.
Modality is the inner symbol; represents the minimum.
"A salesperson works in a minimum of one and a maximum of one office, and an office may be
occupied by or assigned to a minimum of zero and a maximum of one salesperson." - CORRECT
ANSWER -
"A salesperson may have no customers or many customers." - CORRECT ANSWER -
Describe the ER model for "Each salesperson is authorized to sell to at least one or many
products, and each product can be sold by at least one or many salespeople." - CORRECT
ANSWER -
"One salesperson backs-up another salesperson."
What is the name of this model? - CORRECT ANSWER - One-to-one unary relationship
"A salesperson manages zero to many other salespersons, and a salesperson is managed by
exactly one other salesperson."
