WGU C175 Study Notecards
Question 1.
Flat Files
ANSWER
a file having no internal hierarchy
Question 2.
Hashed Files
ANSWER
A file that has been encrypted for security purposes.
Question 3.
Heap File
ANSWER
An unsorted set of records.
Question 4.
Information
ANSWER
The transformation of raw data into useful facts.
Question 5.
Punch Card
ANSWER
A card that is perforated and can hold commands or data.
Question 6.
Structured Data
ANSWER
Information with a high degree of organization.
Question 7.
Unstructured Data
ANSWER
Information that does not have structure (such as text)
, Question 8.
Binary Relationship
ANSWER
A relationship between two entity types.
Question 9.
Unary Relationship
ANSWER
An associate occurrence of an entity type with other occurrences of the same entity type.
Question 10.
Cardinality
ANSWER
The maximum number of entities that can be involved in a particular relationship.
Question 11.
E-R Model *E-R = Entity - Relationship
ANSWER
Diagram of entities together with their attributes and the relationship among them.
Question 12.
Intersection Data
ANSWER
It is data that describes a many-to-many relationship.
Question 13.
Modality
ANSWER
It is a minimum number of entity occurrences that can be involved in a relationship.
Question 14.
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.
Question 15.
Ternary Relationship
ANSWER
Involves three different entity types.
, Question 16.
Unique identifier
ANSWER
It is used to uniquely identify each record in a data-base table.
Question 17.
Attribute
ANSWER
A property, characteristic, or fact that we know about an entity.
Question 18.
"A salesperson works in one office." What is the name of this relationship?
ANSWER
One-to-one binary relationship
Question 19.
"A salesperson sells to many customers." What is the name of this relationship?
ANSWER
One-to-many binary relationship
Question 20.
"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 re-lationship
Question 21.
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.
Question 22.
"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
Question 1.
Flat Files
ANSWER
a file having no internal hierarchy
Question 2.
Hashed Files
ANSWER
A file that has been encrypted for security purposes.
Question 3.
Heap File
ANSWER
An unsorted set of records.
Question 4.
Information
ANSWER
The transformation of raw data into useful facts.
Question 5.
Punch Card
ANSWER
A card that is perforated and can hold commands or data.
Question 6.
Structured Data
ANSWER
Information with a high degree of organization.
Question 7.
Unstructured Data
ANSWER
Information that does not have structure (such as text)
, Question 8.
Binary Relationship
ANSWER
A relationship between two entity types.
Question 9.
Unary Relationship
ANSWER
An associate occurrence of an entity type with other occurrences of the same entity type.
Question 10.
Cardinality
ANSWER
The maximum number of entities that can be involved in a particular relationship.
Question 11.
E-R Model *E-R = Entity - Relationship
ANSWER
Diagram of entities together with their attributes and the relationship among them.
Question 12.
Intersection Data
ANSWER
It is data that describes a many-to-many relationship.
Question 13.
Modality
ANSWER
It is a minimum number of entity occurrences that can be involved in a relationship.
Question 14.
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.
Question 15.
Ternary Relationship
ANSWER
Involves three different entity types.
, Question 16.
Unique identifier
ANSWER
It is used to uniquely identify each record in a data-base table.
Question 17.
Attribute
ANSWER
A property, characteristic, or fact that we know about an entity.
Question 18.
"A salesperson works in one office." What is the name of this relationship?
ANSWER
One-to-one binary relationship
Question 19.
"A salesperson sells to many customers." What is the name of this relationship?
ANSWER
One-to-many binary relationship
Question 20.
"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 re-lationship
Question 21.
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.
Question 22.
"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
