WGU C175 Pre-Assessment UPDATED
ACTUAL Exam Questions and CORRECT
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
What is an attribute or group of attributes that uniquely identify a tuple in a relation? -
CORRECT ANSWER - Primary key
What is necessary for a primary key in one relation of a database to match with its corresponding
foreign key in another relation of the same database? - CORRECT ANSWER - A domain
of values
What uniquely identifies each entity in a collection of entities but is not the primary key? -
CORRECT ANSWER - The alternate key
ACTUAL Exam Questions and CORRECT
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
What is an attribute or group of attributes that uniquely identify a tuple in a relation? -
CORRECT ANSWER - Primary key
What is necessary for a primary key in one relation of a database to match with its corresponding
foreign key in another relation of the same database? - CORRECT ANSWER - A domain
of values
What uniquely identifies each entity in a collection of entities but is not the primary key? -
CORRECT ANSWER - The alternate key
