WGU C175 Pre-Assessment Exam 50 Questions
with Verified Answers
What is a broad definition of data? - CORRECT ANSWER Raw facts that are
captured on printed or digital media
What are data? - CORRECT ANSWER Facts that are collected and stored in a
database system
What is a determining characteristic of unstructured data? - CORRECT ANSWER It
does not follow a data model.
Which is true about flat files? - CORRECT ANSWER They contain no internal
hierarchical organization.
Which technology has no internal hierarchy? - CORRECT ANSWER Flat files
How were data retrieved before database management systems? - CORRECT
ANSWER Sequentially from simple files
In which two ways does a database management system environment increase
effectiveness in working with data? - CORRECT 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? - CORRECT ANSWER Entity types
Which classification is correct for the box marked "Quantity" in the given entity-
relationship diagram? - CORRECT ANSWER Intersection data
Which data classification is an entity? - CORRECT 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? - CORRECT
ANSWER Many-to-many
Which three kinds of rules for referential integrity are provided by modern
relational database management systems? - CORRECT ANSWER Insert, Delete,
Update
What is an important aspect of "referential integrity"? - CORRECT 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.
Which kind of data in this database would qualify as intersection data related to
both the product and salesperson entities? - CORRECT ANSWER Customer names
with Verified Answers
What is a broad definition of data? - CORRECT ANSWER Raw facts that are
captured on printed or digital media
What are data? - CORRECT ANSWER Facts that are collected and stored in a
database system
What is a determining characteristic of unstructured data? - CORRECT ANSWER It
does not follow a data model.
Which is true about flat files? - CORRECT ANSWER They contain no internal
hierarchical organization.
Which technology has no internal hierarchy? - CORRECT ANSWER Flat files
How were data retrieved before database management systems? - CORRECT
ANSWER Sequentially from simple files
In which two ways does a database management system environment increase
effectiveness in working with data? - CORRECT 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? - CORRECT ANSWER Entity types
Which classification is correct for the box marked "Quantity" in the given entity-
relationship diagram? - CORRECT ANSWER Intersection data
Which data classification is an entity? - CORRECT 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? - CORRECT
ANSWER Many-to-many
Which three kinds of rules for referential integrity are provided by modern
relational database management systems? - CORRECT ANSWER Insert, Delete,
Update
What is an important aspect of "referential integrity"? - CORRECT 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.
Which kind of data in this database would qualify as intersection data related to
both the product and salesperson entities? - CORRECT ANSWER Customer names
