WGU C175 FINAL EXAM WITH QUESTIONS AND
WELL VERIFIED ANSWERS [GRADED A+]
ACTUAL 100%
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
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
What is a determining characteristic of unstructured data? - ANS✔✔---It does not follow
a data model.
, 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.
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
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? - ANS✔✔---A
domain of values
What uniquely identifies each entity in a collection of entities but is not the primary key? -
ANS✔✔---The alternate key
WELL VERIFIED ANSWERS [GRADED A+]
ACTUAL 100%
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
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
What is a determining characteristic of unstructured data? - ANS✔✔---It does not follow
a data model.
, 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.
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
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? - ANS✔✔---A
domain of values
What uniquely identifies each entity in a collection of entities but is not the primary key? -
ANS✔✔---The alternate key
