WGU C175 Pre-Assessment 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,
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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 on values in another relation.Sales data, detailing the customer names, products sold, and salespersons, is kept in a database.
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