Wgu C175 Objective Assessment Practice Test Bank Newest 2026 | Wgu C175 Data Management Foundations | 500 + Real Oa Q&A + Detailed Rationales + Study Notes | A+ Bundle 2026

WGU C175 OBJECTIVE ASSESSMENT PRACTICE TEST BANK
NEWEST 2026 | WGU C175 DATA MANAGEMENT FOUNDATIONS |
500 + REAL OA Q&A + DETAILED RATIONALES + STUDY NOTES | A+
BUNDLE 2026
Which of the following best defines the term "data" as used in database management
systems?
A) Processed information that is ready for decision-making.
B) Raw, unorganized facts that can be stored and processed by a computer.
C) A collection of related records stored in a single file.
D) Metadata that describes the structure of a database.

Rationale: The correct answer is B. In database management, data is defined as raw,
unorganized facts that have not yet been processed to reveal meaning. Option A describes
information, not data. Option C describes a file or table, not the fundamental definition of
data. Option D refers to metadata, which is data about data, not the data itself.
Understanding this distinction is foundational for the WGU C175 curriculum because it
underpins the entire data-to-information lifecycle.



Which type of database model organizes data in tables consisting of rows and
columns, with established relationships via primary and foreign keys?
A) Hierarchical model.
B) Network model.
C) Relational model.
D) Object-oriented model.

Rationale: The correct answer is C. The relational model, introduced by E.F. Codd, uses
two-dimensional tables (relations) to store data, with rows representing records and
columns representing attributes. Primary keys uniquely identify rows, and foreign keys link
tables. Option A uses a tree-like structure, Option B allows many-to-many relationships
with pointers, and Option D stores data as objects. For WGU C175, mastery of the
relational model is critical because it is the most widely used model in modern DBMS.



What is the primary purpose of a primary key in a relational database table?
A) To ensure that all columns contain unique values.
B) To uniquely identify each row in the table.

,C) To establish a relationship with another table.
D) To sort data in ascending order.

Rationale: The correct answer is B. A primary key enforces entity integrity by uniquely
identifying each record in a table. While option A is partially true, primary keys require
uniqueness only for the key column(s), not all columns. Option C describes a foreign key,
not a primary key. Option D is a function of the ORDER BY clause, not a key constraint. In
the WGU C175 exam, you must distinguish between primary keys, foreign keys, and
candidate keys.



Which constraint ensures that a column or set of columns in one table matches
values in the primary key of another table?
A) UNIQUE constraint.
B) NOT NULL constraint.
C) FOREIGN KEY constraint.
D) CHECK constraint.

Rationale: The correct answer is C. A foreign key constraint enforces referential integrity by
ensuring that values in a column (or columns) correspond to existing primary key values in
a referenced table. Option A enforces uniqueness within a table. Option B prevents null
entries. Option D validates data against a condition. In C175, referential integrity is a core
concept for maintaining consistent relationships between tables.



Which normal form requires that a table have no repeating groups and that all non-key
attributes are fully functionally dependent on the entire primary key?
A) First Normal Form (1NF).
B) Second Normal Form (2NF).
C) Third Normal Form (3NF).
D) Boyce-Codd Normal Form (BCNF).

Rationale: The correct answer is B. 2NF builds on 1NF (no repeating groups) by removing
partial dependencies – meaning every non-key attribute must depend on the entire
composite primary key. Option A only addresses repeating groups. Option C removes
transitive dependencies. Option D is a stricter version of 3NF. For WGU C175,
normalization is a high-weight area; understanding each normal form's requirements is
essential for database design.

, What is the main purpose of normalization in database design?
A) To increase data redundancy.
B) To reduce data anomalies and dependency.
C) To improve query performance at all costs.
D) To simplify the database schema by using fewer tables.

Rationale: The correct answer is B. Normalization organizes data to minimize redundancy
and avoid anomalies like insertion, update, and deletion anomalies. Option A is incorrect
because normalization reduces redundancy. Option C is misleading because
normalization can sometimes degrade query performance due to more joins, though it is
not its primary goal. Option D is false because normalization often increases the number of
tables. In C175, you must understand that normalization is a trade-off between
redundancy and performance.



Which SQL command is used to retrieve data from a database?
A) INSERT.
B) UPDATE.
C) SELECT.
D) DELETE.

Rationale: The correct answer is C. The SELECT statement is the fundamental SQL
command for querying data from one or more tables. Option A adds new rows, Option B
modifies existing rows, and Option D removes rows. The WGU C175 assessment heavily
tests SQL basics, with SELECT being the most frequently used command in practice.



Which clause in a SELECT statement is used to filter rows based on a specified
condition?
A) WHERE.
B) HAVING.
C) GROUP BY.
D) ORDER BY.

Rationale: The correct answer is A. WHERE filters individual rows before grouping or
aggregation. Option B filters groups after GROUP BY. Option C groups rows for aggregate
functions. Option D sorts results. In C175, understanding the order of SQL execution
(FROM → WHERE → GROUP BY → HAVING → SELECT → ORDER BY) is crucial for writing
correct queries.