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WGU C175 Study Notecards With Complete Questions And Answers Rated A+_.pdf
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WGU C175 Study NotecardsJeremiah
Terms in this set (123)
Flat Files a file having no internal hierarchy
Hashed Files A file that has been encrypted for security purposes.
Heap File An unsorted set of records.
Information The transformation of raw data into useful facts.
Punch Card A card that is perforated and can hold commands or data.
Structured Data Information with a high degree of organization.
Unstructured Data Information that does not have structure (such as text)
Binary Relationship A relationship between two entity types.
An associate occurrence of an entity type with other occurrences of the same entity
Unary Relationship
type.
Cardinality The maximum number of entities that can be involved in a particular relationship.
E-R Model Diagram of entities together with their attributes and the relationship among them.
*E-R = Entity - Relationship
Intersection Data It is data that describes a many-to-many relationship.
Modality It is a minimum number of entity occurrences that can be involved in a relationship.
It means that a single occurrence of one entity type can be associated with a single
One-to-one Binary Relationship
occurrence of the other entity type and vice versa.
Ternary Relationship Involves three different entity types.
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