WGU C175 Data Management Foundations Questions &
Answers 2026 | Latest Review Guide
1. Describe the role of the SELECT command in SQL data management.
The SELECT command is used to delete records from a database.
The SELECT command is used to modify existing records in a database.
The SELECT command is used to create new tables in a database.
The SELECT command is used to query and retrieve specific data
from one or more tables in a database.
2. Describe the role of referential integrity in maintaining data consistency
within a relational database.
Referential integrity allows for the deletion of records without
restrictions.
Referential integrity is unrelated to the structure of database tables.
Referential integrity only applies to data encryption processes.
Referential integrity maintains data consistency by ensuring that
foreign keys in one table correspond to primary keys in another.
3. Which of the following operations is NOT included in Data Manipulation
Language (DML)?
Deleting existing records
Updating existing records
Creating new database structures
Inserting new records
,4. What does an INNER JOIN do in SQL?
Selects only the rows from the right table
Selects only the rows from the left table
Selects only rows that have matching values in both left and right
tables
Selects all rows from both tables, regardless of match
5. Describe how affinity grouping can be useful in data analysis.
Affinity grouping is a method for normalizing data.
Affinity grouping organizes data into tables for better management.
Affinity grouping is used to encrypt data for security purposes.
Affinity grouping helps identify patterns and correlations among
data elements, which can inform decision-making.
6. What does throughput specifically quantify in database management?
The efficiency of data encryption methods.
The number of queries satisfied in a given period of time.
The total amount of data stored in the database.
The speed of data retrieval from the database.
7. Describe how time series analysis can be used in data management.
Time series analysis can be used to identify trends and patterns in
data over time, which helps in forecasting future outcomes.
Time series analysis is used to manipulate data within databases.
Time series analysis focuses on the normalization of data structures.
, Time series analysis is primarily concerned with data encryption
techniques.
8. Punch cards were used for:
Voting
Billing
Computer Programming
All of the above
9. What are the three main steps involved in the ETL process?
Extracting, transforming, and loading
Filtering, sorting, and presenting
Collecting, analyzing, and reporting
Storing, processing, and retrieving
10. Describe how a flat file differs from a relational database in terms of data
organization.
A flat file is designed for high-speed transactions, while a relational
database is not.
A flat file organizes data in a single table without relationships,
while a relational database uses multiple tables with defined
relationships.
A flat file allows for data normalization, while a relational database
does not.
A flat file can store complex data types, whereas a relational
database cannot.
, 11. occurs when data are grouped together for further analysis
Data collection
Assessment
Clustering
Testing
12. In a retail database, how might affinity grouping assist in marketing
strategies?
By normalizing product information for better storage.
By organizing customer data into separate tables.
By ensuring all customer data is encrypted.
By revealing which products are frequently purchased together.
13. What is the primary effect of a cascade delete operation in a database?
It deletes all records that reference the primary key.
It creates a backup of all records referencing the primary key.
It prevents any records from being deleted.
It updates all records that reference the primary key.
14. Describe how business intelligence contributes to decision-making in
organizations.
Business intelligence helps organizations make informed decisions
by converting raw data into actionable insights.
Business intelligence is primarily concerned with data encryption.
Business intelligence eliminates the need for data analysis.
Answers 2026 | Latest Review Guide
1. Describe the role of the SELECT command in SQL data management.
The SELECT command is used to delete records from a database.
The SELECT command is used to modify existing records in a database.
The SELECT command is used to create new tables in a database.
The SELECT command is used to query and retrieve specific data
from one or more tables in a database.
2. Describe the role of referential integrity in maintaining data consistency
within a relational database.
Referential integrity allows for the deletion of records without
restrictions.
Referential integrity is unrelated to the structure of database tables.
Referential integrity only applies to data encryption processes.
Referential integrity maintains data consistency by ensuring that
foreign keys in one table correspond to primary keys in another.
3. Which of the following operations is NOT included in Data Manipulation
Language (DML)?
Deleting existing records
Updating existing records
Creating new database structures
Inserting new records
,4. What does an INNER JOIN do in SQL?
Selects only the rows from the right table
Selects only the rows from the left table
Selects only rows that have matching values in both left and right
tables
Selects all rows from both tables, regardless of match
5. Describe how affinity grouping can be useful in data analysis.
Affinity grouping is a method for normalizing data.
Affinity grouping organizes data into tables for better management.
Affinity grouping is used to encrypt data for security purposes.
Affinity grouping helps identify patterns and correlations among
data elements, which can inform decision-making.
6. What does throughput specifically quantify in database management?
The efficiency of data encryption methods.
The number of queries satisfied in a given period of time.
The total amount of data stored in the database.
The speed of data retrieval from the database.
7. Describe how time series analysis can be used in data management.
Time series analysis can be used to identify trends and patterns in
data over time, which helps in forecasting future outcomes.
Time series analysis is used to manipulate data within databases.
Time series analysis focuses on the normalization of data structures.
, Time series analysis is primarily concerned with data encryption
techniques.
8. Punch cards were used for:
Voting
Billing
Computer Programming
All of the above
9. What are the three main steps involved in the ETL process?
Extracting, transforming, and loading
Filtering, sorting, and presenting
Collecting, analyzing, and reporting
Storing, processing, and retrieving
10. Describe how a flat file differs from a relational database in terms of data
organization.
A flat file is designed for high-speed transactions, while a relational
database is not.
A flat file organizes data in a single table without relationships,
while a relational database uses multiple tables with defined
relationships.
A flat file allows for data normalization, while a relational database
does not.
A flat file can store complex data types, whereas a relational
database cannot.
, 11. occurs when data are grouped together for further analysis
Data collection
Assessment
Clustering
Testing
12. In a retail database, how might affinity grouping assist in marketing
strategies?
By normalizing product information for better storage.
By organizing customer data into separate tables.
By ensuring all customer data is encrypted.
By revealing which products are frequently purchased together.
13. What is the primary effect of a cascade delete operation in a database?
It deletes all records that reference the primary key.
It creates a backup of all records referencing the primary key.
It prevents any records from being deleted.
It updates all records that reference the primary key.
14. Describe how business intelligence contributes to decision-making in
organizations.
Business intelligence helps organizations make informed decisions
by converting raw data into actionable insights.
Business intelligence is primarily concerned with data encryption.
Business intelligence eliminates the need for data analysis.
