WGU C175 PRE-ASSESSMENT EXAM
UPDATED QUESTIONS AND CORRECT
ANSWERS.
What is a broad definition of data? - ANS Raw facts that are captured on printed or digital
media
What are data? - ANS Facts that are collected and stored in a database system
What is a determining characteristic of unstructured data? - ANS It does not follow a data
model.
Which is true about flat files? - ANS They contain no internal hierarchical organization.
Which technology has no internal hierarchy? - ANS Flat files
How were data retrieved before database management systems? - ANS Sequentially from
simple files
In which two ways does a database management system environment increase effectiveness in
working with data? - ANS - It enables data sharing,
- It permits storage of vast volumes of data.
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
, What is the uniquely identifiable element about which data can be categorized in an entity-
relationship diagram? - ANS Entity types
Which classification is correct for the box marked "Quantity" in the given entity-relationship
diagram? - ANS Intersection data
Which data classification is an entity? - ANS 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? - ANS Many-to-many
Which three kinds of rules for referential integrity are provided by modern relational database
management systems? - ANS Insert, Delete, Update
What is an important aspect of "referential integrity"? - ANS 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? - ANS Customer names
What is an attribute or group of attributes that uniquely identify a tuple in a relation? -
ANS Primary key
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
UPDATED QUESTIONS AND CORRECT
ANSWERS.
What is a broad definition of data? - ANS Raw facts that are captured on printed or digital
media
What are data? - ANS Facts that are collected and stored in a database system
What is a determining characteristic of unstructured data? - ANS It does not follow a data
model.
Which is true about flat files? - ANS They contain no internal hierarchical organization.
Which technology has no internal hierarchy? - ANS Flat files
How were data retrieved before database management systems? - ANS Sequentially from
simple files
In which two ways does a database management system environment increase effectiveness in
working with data? - ANS - It enables data sharing,
- It permits storage of vast volumes of data.
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
, What is the uniquely identifiable element about which data can be categorized in an entity-
relationship diagram? - ANS Entity types
Which classification is correct for the box marked "Quantity" in the given entity-relationship
diagram? - ANS Intersection data
Which data classification is an entity? - ANS 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? - ANS Many-to-many
Which three kinds of rules for referential integrity are provided by modern relational database
management systems? - ANS Insert, Delete, Update
What is an important aspect of "referential integrity"? - ANS 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? - ANS Customer names
What is an attribute or group of attributes that uniquely identify a tuple in a relation? -
ANS Primary key
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
