wgu c175 vocab fully solved graded A+
2023
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 It is a relationship between two entity types.
Unary Relationship - correct answer It is an associate occurrence of an entity type with
other occurrences of the same entity type.
Cardinality - correct answer It is the maximum number of entities that can be involved in
a particular relationship.
E-R Model - correct answer It is well named, as it diagrams 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 - Property, characteristic, or fact that we know about an entity.
Describe the ER model for "A salesperson works in one office."
- What is the name of this relationship? - correct answer - One-to-one binary
relationship
Describe the ER model for "A salesperson sells to many customers."
- What is the name of this relationship? - correct answer - One-to-many binary
relationship
Describe the ER model for "(L to R) A salesperson is authorized to sell many products;
(R to L) 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 ER model? -
correct answer - Cardinality is the outer symbol; represents the maximum.
- Modality is the inner symbol; represents the minimum.
Describe the ER model for "(L to R) A salesperson works in a minimum of one and a
maximum of one office, or exactly one office." "(R to L) An office may be occupied by or
assigned to a minimum of no salespersons or a maximum of one salesperson." - correct
answer
Describe the ER model for "A salesperson may have no customers or many
customers." - correct answer
Describe the ER model for "(L to R) Each salesperson is authorized to sell to at least
one or many of our products."and "(R to L) Each product can be sold by at least one or
many of our salespersons." - correct answer
Describe the ER model for "One salesperson backs-up another salesperson."
- What is the name of this model? - correct answer - One-to-one unary relationship
Describe the ER model for "(L to R) A salesperson manages zero to many other
salespersons." and "(R to L) A salesperson is managed by exactly one other
salesperson."
- What is the name of this model? - correct answer - One-to-many unary relationship
Describe the ER model for "(L to R) A product can be part of no other products or part of
several other products." and "(R to L) A product can be composed of no other products
or be composed of several other products."
- What is the name of this model? - correct answer - Many-to-many unary relationship
2023
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 It is a relationship between two entity types.
Unary Relationship - correct answer It is an associate occurrence of an entity type with
other occurrences of the same entity type.
Cardinality - correct answer It is the maximum number of entities that can be involved in
a particular relationship.
E-R Model - correct answer It is well named, as it diagrams 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 - Property, characteristic, or fact that we know about an entity.
Describe the ER model for "A salesperson works in one office."
- What is the name of this relationship? - correct answer - One-to-one binary
relationship
Describe the ER model for "A salesperson sells to many customers."
- What is the name of this relationship? - correct answer - One-to-many binary
relationship
Describe the ER model for "(L to R) A salesperson is authorized to sell many products;
(R to L) 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 ER model? -
correct answer - Cardinality is the outer symbol; represents the maximum.
- Modality is the inner symbol; represents the minimum.
Describe the ER model for "(L to R) A salesperson works in a minimum of one and a
maximum of one office, or exactly one office." "(R to L) An office may be occupied by or
assigned to a minimum of no salespersons or a maximum of one salesperson." - correct
answer
Describe the ER model for "A salesperson may have no customers or many
customers." - correct answer
Describe the ER model for "(L to R) Each salesperson is authorized to sell to at least
one or many of our products."and "(R to L) Each product can be sold by at least one or
many of our salespersons." - correct answer
Describe the ER model for "One salesperson backs-up another salesperson."
- What is the name of this model? - correct answer - One-to-one unary relationship
Describe the ER model for "(L to R) A salesperson manages zero to many other
salespersons." and "(R to L) A salesperson is managed by exactly one other
salesperson."
- What is the name of this model? - correct answer - One-to-many unary relationship
Describe the ER model for "(L to R) A product can be part of no other products or part of
several other products." and "(R to L) A product can be composed of no other products
or be composed of several other products."
- What is the name of this model? - correct answer - Many-to-many unary relationship
