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Free PDF Quiz 2026 Data-Management-Foundations: WGU Data Management–Foundations Exam–Reliable Official Study Guide

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WGU Data-Management-Foundations Exam Syllabus Topics:

Topic
Details

Topic 1

Visualization: This part of the exam measures skills of Business Intelligence Analysts and covers the representation of information using charts, graphs, and dashboards. Candidates demonstrate the ability to effectively communicate findings and trends to a broad audience through visual displays.

Topic 2

Data management: This section of the exam measures skills of Data Managers and covers core concepts of data modeling, database architecture, and the implementation of relational database systems. Learners study database design fundamentals and are evaluated on their ability to organize, store, and retrieve data efficiently.

Topic 3

Model deployment and storytelling: This section of the exam measures skills of Data Engineers and includes operationalizing machine learning models and presenting analytical results in a compelling narrative. The content addresses model validation and the communication of insights in ways that foster business understanding and action

WGU Data Management – Foundations Exam Sample Questions (Q29-Q34):

NEW QUESTION # 29
What is the last step in the logical design process for designing a database?

A. Determine cardinality
B. Discover entities
C. Analyze data requirements
D. Apply a normal form

Answer: D

Explanation:
Thelogical design phasein database development focuses onstructuring data efficientlyto eliminate redundancy and ensure integrity. Thefinal step in logical designis toapply normalization (normal forms)to optimize the database schema.
Steps in Logical Database Design:
* Discover entities# Identify real-world objects (e.g., Customers, Orders).
* Determine cardinality# Define relationships between entities (one-to-one, one-to-many).
* Analyze data requirements# Determine the attributes each entity needs.
* Apply normal forms# Eliminate redundancy and improve data consistency.
Example Usage:
* After identifying entities likeStudentsandCourses, applying3rd Normal Form (3NF)ensures that data isorganized without redundancy.
Why Other Options Are Incorrect:
* Option A (Analyze data requirements) (Incorrect):Doneearlierto define attributes.
* Option C (Determine cardinality) (Incorrect):Donebeforenormalization to establish relationships.
* Option D (Discover entities) (Incorrect):Done at thebeginningof database design.
Thus, the correct answer isApply a normal form, as normalization is thelast step in logicaldesign.

NEW QUESTION # 30
What does the aggregate function do?

A. It lists combinations of rows in two tables.
B. It eliminates one or more columns of a table.
C. It computes values over a set of rows.
D. It selects rows that appear in one table but not another.

Answer: C

Explanation:
Anaggregate functionperforms acalculation over multiple rowsand returns asingle value. Examples include SUM(), AVG(), MAX(), MIN(), and COUNT()in SQL.
* Option A (Correct):Aggregate functions compute values over aset of rows, like summingtotal sales or averaging grades.
* Option B (Incorrect):Selecting rows that appear in one table but not another is done usingset operations (EXCEPT or MINUS in SQL).
* Option C (Incorrect):Eliminating columns is done using thePROJECToperation orSELECT with specific columns.
* Option D (Incorrect):Combining rows from two tables refers to aJOIN operation, not aggregation.

NEW QUESTION # 31
Which keyword can be used as a clause in an ALTER TABLE statement?

A. STOP
B. DELETE
C. CHANGE
D. AGGREGATE

Answer: C

Explanation:
TheALTER TABLEstatement is used to modify an existing database table structure. One common clause is CHANGE, which allows renaming a column and modifying its data type.
Example:
sql
ALTER TABLE Employees CHANGE COLUMN OldName NewName VARCHAR(50);
* Option A (Incorrect):DELETE is used to removerows, not alter table structure.
* Option B (Correct):CHANGE is avalid clausefor renaming and modifying columns in MySQL and some other databases.
* Option C (Incorrect):STOP is not a valid SQL keyword for altering tables.
* Option D (Incorrect):AGGREGATE refers to functions like SUM() and AVG(), not table alterations.

NEW QUESTION # 32
Which primary key values consist of a single field only?

A. Meaningless
B. Stable
C. Simple
D. Partition

Answer: C

Explanation:
Asimple primary keyconsists ofonly one columnthat uniquely identifies each row in a table.
Example Usage:
sql
CREATE TABLE Students (
StudentID INT PRIMARY KEY,
Name VARCHAR(50)
);
* StudentIDis asimple primary keybecause it consists of only one field.
Why Other Options Are Incorrect:
* Option B (Partition) (Incorrect):Refers topartitioned tables, which divide data for performance reasons butare not related to primary keys.
* Option C (Stable) (Incorrect):This is not a recognized term in database keys.
* Option D (Meaningless) (Incorrect):Primary keys are oftenmeaningless (e.g., auto-incremented IDs)
, but this isnot a term used to describe their structure.
Thus, the correct answer isSimple, as asingle-field primary keyis referred to as asimple primary key.

NEW QUESTION # 33
Which capability should databases maintain to simplify the use of SQL with a general-purpose language?

A. The ability to reverse results if needed
B. The use of an application programming interface
C. The query processor to deliver results
D. The storage manager to interpret low-level file-system commands

Answer: B

Explanation:
Databases need to supportApplication Programming Interfaces (APIs)to enable seamless integration with general-purpose programming languageslike Python, Java, and C#. APIs likeODBC (Open Database Connectivity) and JDBC (Java Database Connectivity)allow applications to interact with databases without requiring complex SQL commands.
* Option A (Incorrect):Thestorage manageris responsible for managing low-levelfile system operations, but it does not simplify SQL integration with programming languages.
* Option B (Incorrect):The ability toreverse results(e.g., using ORDER BY DESC) is a SQL feature but is unrelated to integration with programming languages.
* Option C (Incorrect):Thequery processoroptimizes and executes SQL queries but does not provide an interface for application development.
* Option D (Correct):APIsallow databases to be accessed easily from different programming environments, simplifying integration.

NEW QUESTION # 34
......

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