WGU C175 FINAL EXAM 1+2 WITH QUESTIONS
AND WELL IDENTIFIED ANSWERS [ALREADY
GRADED A+] REAL EXAM 100% 2026
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.
,Which kind of data in this database would qualify as intersection data related to both the
product and salesperson entities?answer✔✔---Customer names
What is an attribute or group of attributes that uniquely identify a tuple in a
relation?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?answer✔✔---A
domain of values
What uniquely identifies each entity in a collection of entities but is not the primary
key?answer✔✔---The alternate key
What is a term for a set of columns in a table that can uniquely identify any record in that
table without referring to other data?answer✔✔---Candidate key
What happens to the original data in database indexing?answer✔✔---It is copied to the
index.
Why are indexes created in a physical database design?answer✔✔---To retrieve data
directly using a pointer.
Why is an index created on a database column?answer✔✔---To optimize data
retrievals
Refer to the given SQL statement.
SELECT SPNUM, SPNAME
FROM SALESPERSON
, What is the correct line to add to the end of this statement to find salespersons with a
commission percentage of 15?answer✔✔---WHERE COMMPERCT=15;
Refer to the given SQL statement.
SELECT COMMPERCT, YEARHIRE
FROM SALESPERSON
WHERE SPNUM=22;
How should this statement be altered to retrieve the entire record instead of the
commission percentage and year of hire?answer✔✔---Replace COMMPERCT,
YEARHIRE with an asterisk
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
AND WELL IDENTIFIED ANSWERS [ALREADY
GRADED A+] REAL EXAM 100% 2026
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.
,Which kind of data in this database would qualify as intersection data related to both the
product and salesperson entities?answer✔✔---Customer names
What is an attribute or group of attributes that uniquely identify a tuple in a
relation?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?answer✔✔---A
domain of values
What uniquely identifies each entity in a collection of entities but is not the primary
key?answer✔✔---The alternate key
What is a term for a set of columns in a table that can uniquely identify any record in that
table without referring to other data?answer✔✔---Candidate key
What happens to the original data in database indexing?answer✔✔---It is copied to the
index.
Why are indexes created in a physical database design?answer✔✔---To retrieve data
directly using a pointer.
Why is an index created on a database column?answer✔✔---To optimize data
retrievals
Refer to the given SQL statement.
SELECT SPNUM, SPNAME
FROM SALESPERSON
, What is the correct line to add to the end of this statement to find salespersons with a
commission percentage of 15?answer✔✔---WHERE COMMPERCT=15;
Refer to the given SQL statement.
SELECT COMMPERCT, YEARHIRE
FROM SALESPERSON
WHERE SPNUM=22;
How should this statement be altered to retrieve the entire record instead of the
commission percentage and year of hire?answer✔✔---Replace COMMPERCT,
YEARHIRE with an asterisk
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
