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Flat Files - Answer - a file having no internal hierarchy
Hashed Files - Answer - A file that has been encrypted for security purposes.
Heap File - Answer - An unsorted set of records.
Information - Answer - The transformation of raw data into useful facts.
Punch Card - Answer - A card that is perfo and can hold commands or data.
Structured Data - Answer - Information with a high degree of organization.
Unstructured Data - Answer - Information that does not have structure (such as text)
Binary Relationship - Answer - A relationship between two entity types.
Unary Relationship - Answer - An associate occurrence of an entity type with other occurrences of the same entity type.
Cardinality - Answer - The maximum number of entities that can be involved in a particular relationship.
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.
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