Data Management Foundation C175 WGU Exam Elaboration |Question and Answer| 2024/2025

Data Management Foundation C175 WGU Exam Elaboration |Question and Answer| 2024/2025 Associative Entity *Ans* An associative entity is an element of the entity-relationship model. All relationships for the associative entity should be many. Attribute *Ans* An attribute is a property or characteristic of an entity. Binary relationship *Ans* A binary relationship is a relationship between two entity types. Candidate Key *Ans* Is any column or a combination of columns that can qualify as unique key in database. Cardinality *Ans* Cardinality represents the maximum number of entities that can be involved in a particular relationship. Cartesian product *Ans* Usually the result of a missing join condition or a method of expanding the data of 1 table by the number of rows in the second table. Cascade Delete *Ans* Will delete all records that reference the primary key column subquery *Ans* Returns a single column of one or more values. data encryption *Ans* When data is encrypted, it is changed, bit by bit or character by character, into a form that looks totally garbled. It can and must be reconverted, or decrypted, back to its original form to be of use. Data normalization *Ans* Is a methodology for organizing attributes into tables so that redundancy among the non-key attributes is eliminated. Data volatility *Ans* Describes how often stored data is updated. Data Volume Assessment *Ans* Understanding of how much data will be in a database or a table within a database Database *Ans* A database is a collection of information that is organized so that it can easily be accessed, managed, and updated. DCL *Ans* Data control language is used to control access to data stored in a database.