WGU C175 Study Notecards (Latest
2025/ 2026 Update) Questions and
Verified Answers| 100% Correct| Grade A
E-R Model
*E-R = Entity - Relationship - ANSWER Diagram of entities
together with their attributes and the relationship among them.
Intersection Data - ANSWER It is data that describes a many-to-
many relationship.
Modality - ANSWER It is a minimum number of entity occurrences
that can be involved in a relationship.
One-to-one Binary Relationship - 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 - ANSWER Involves three different entity
types.
Unique identifier - ANSWER It is used to uniquely identify each
record in a database table.
Attribute - 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? - ANSWER One-to-one binary
relationship
"A salesperson sells to many customers."
What is the name of this relationship? - 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? - ANSWER Many-to-many
binary relationship
What is the positioning and meaning for Cardinality and Modality on an E-R
model? - 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." - ANSWER
"A salesperson may have no customers or many customers." - 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."
- ANSWER
2025/ 2026 Update) Questions and
Verified Answers| 100% Correct| Grade A
E-R Model
*E-R = Entity - Relationship - ANSWER Diagram of entities
together with their attributes and the relationship among them.
Intersection Data - ANSWER It is data that describes a many-to-
many relationship.
Modality - ANSWER It is a minimum number of entity occurrences
that can be involved in a relationship.
One-to-one Binary Relationship - 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 - ANSWER Involves three different entity
types.
Unique identifier - ANSWER It is used to uniquely identify each
record in a database table.
Attribute - 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? - ANSWER One-to-one binary
relationship
"A salesperson sells to many customers."
What is the name of this relationship? - 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? - ANSWER Many-to-many
binary relationship
What is the positioning and meaning for Cardinality and Modality on an E-R
model? - 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." - ANSWER
"A salesperson may have no customers or many customers." - 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."
- ANSWER
