WGU C175 Study Notecards Questions & Answers 2024/2025

WGU C175 Study Notecards Questions & Answers 2024/2025 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 perforated 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. "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.