WGU C175 Pre-Assessment Questions With Answers 2022/2023

What is a broad definition of data? - Answer - Raw facts that are captured on printed or digital media What are data? - Answer - Facts that are collected and stored in a database system What is a determining characteristic of unstructured data? - Answer - It does not follow a data model. Which is true about flat files? - Answer - They contain no internal hierarchical organization. Which technology has no internal hierarchy? - Answer - Flat files How were data retrieved before database management systems? - Answer - Sequentially from simple files In which two ways does a database management system environment increase effectiveness in working with data? - Answer - - It enables data sharing, - It permits storage of vast volumes of data. What is the uniquely identifiable element about which data can be categorized in an entity-relationship diagram? - Answer - Entity types Which classification is correct for the box marked "Quantity" in the given entity-relationship diagram? - Answer - Intersection data Which data classification is an entity? - Answer - Event A salesperson is authorized to sell 12 products; a product can be sold by 10 salespersons. Which kind of binary relationship is described in this example? - Answer - Many-to-many Which three kinds of rules for referential integrity are provided by modern relational database management systems? - Answer - Insert, Delete, Update What is an important aspect of "referential integrity"? - Answer - Reference to data in one relation is based o