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WGU Data-Management-Foundations Exam Syllabus Topics:

Topic	Details
Topic 1	Statistical analysis: This section of the exam measures skills of Data Scientists and emphasizes the use of statistical techniques to interpret and summarize data. Candidates are assessed on applying descriptive and inferential statistics to draw valid conclusions from datasets.
Topic 2	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
Topic 3	Data wrangling: This section of the exam measures skills of Data Analysts and involves preparing, cleaning, and transforming data into suitable formats for analysis. The focus is on resolving data inconsistencies, handling missing values, and reformatting data to maintain accuracy for analysis tasks.

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WGU Data Management – Foundations Exam Sample Questions (Q16-Q21):

NEW QUESTION # 16
Which property is associated with a one-field primary key?

A. Composite
B. Duplicate
C. Simple
D. Numeric

Answer: C

Explanation:
Aprimary keyuniquely identifies each row in a table. When a primary key consists ofonly one field, it is called aSimple Primary Key.
Types of Primary Keys:
* Simple Primary Key (Correct Answer):
* Contains onlyone column.
* Example:
sql
CREATE TABLE Students (
StudentID INT PRIMARY KEY,
Name VARCHAR(50)
);
* Composite Primary Key:
* Usesmultiple columnsto ensure uniqueness.
* Example:
sql
CREATE TABLE Orders (
OrderID INT,
ProductID INT,
PRIMARY KEY (OrderID, ProductID)
);
* Surrogate Primary Key:
* A system-generatedunique identifier(e.g., UUID or AUTO_INCREMENT).
Why Other Options Are Incorrect:
* Option B (Duplicate) (Incorrect):A primary keymust be unique, so itcannot be duplicate.
* Option C (Numeric) (Incorrect):While primary keyscan be numeric, they can also be alphanumeric (VARCHAR).
* Option D (Composite) (Incorrect):Acompositekey consists ofmultiple fields, whereas a simple key is a single field.
Thus, the correct answer isSimple, since aone-field primary keyis a simple primary key.

NEW QUESTION # 17
Which SQL command uses the correct syntax to add a new employee "John Doe" to the Employee table?

A. INSERT Employee { "John Doe" };
B. INSERT Employee (Name) Values ("John Doe");
C. INSERT INTO Employee ("John Doe");
D. INSERT INTO Employee (Name) VALUES ("John Doe");

Answer: D

Explanation:
Thecorrect syntaxfor inserting a new row into a table follows this structure:
Standard SQL INSERT Syntax:
sql
INSERT INTO TableName (Column1, Column2, ...)
VALUES (Value1, Value2, ...);
For this scenario:
sql
INSERT INTO Employee (Name) VALUES ('John Doe');
Why Other Options Are Incorrect:
* Option A (Incorrect):Uses incorrect syntax { ... }, which isnot valid SQL syntax.
* Option C (Incorrect):Does not specify the column name, whichcauses an error.
* Option D (Incorrect):Misses theINTOkeyword, which is required in standard SQL.
Thus, the correct syntax isOption B, ensuring aproperly formatted insert statement.

NEW QUESTION # 18
Which designation is an individual value, such as a salary?

A. Glossary
B. Entity type
C. Attribute type
D. Relationship

Answer: C

Explanation:
Anattribute typerefers to asingle, specific valuewithin a table, such as Salary, Age, or Price.
Example Usage:
A screenshot of a computer AI-generated content may be incorrect.

CREATE TABLE Employees (
EmpID INT PRIMARY KEY,
Name VARCHAR(50),
Salary DECIMAL(10,2)
);
* Salary is anattribute typewith individual values for each employee.
Why Other Options Are Incorrect:
* Option A (Glossary) (Incorrect):Refers todocumentation, not database values.
* Option B (Entity type) (Incorrect):Representsa class of objects(e.g., Employees), not individual values.
* Option D (Relationship) (Incorrect):Definesconnections between entities, not attributes.
Thus, the correct answer isAttribute type, as it represents anindividual data value.

NEW QUESTION # 19
Which relationship or association exists between a supertype and its subtype entities?

A. IsA relationship
B. Associative entity
C. Strong entity
D. Weak entity

Answer: A

Explanation:
Indatabase modeling, the relationship between asupertype and its subtypesis called anIsA relationship.
Example Usage:
* AVehicle supertypemay haveCar and Truck subtypes.
Vehicle
### Car
### Truck
* InER diagrams, this is represented as:
Vehicle (Supertype)
|
### Car (Subtype)
### Truck (Subtype)
* SQL Table Implementation:
sql
CREATE TABLE Vehicle (
VehicleID INT PRIMARY KEY,
Make VARCHAR(50),
Model VARCHAR(50)
);
CREATE TABLE Car (
VehicleID INT PRIMARY KEY,
FOREIGN KEY (VehicleID) REFERENCES Vehicle(VehicleID),
EngineType VARCHAR(50)
);
CREATE TABLE Truck (
VehicleID INT PRIMARY KEY,
FOREIGN KEY (VehicleID) REFERENCES Vehicle(VehicleID),
CargoCapacity INT
);
* This structurepreserves the IsA relationshipbetween Vehicle (supertype) and Car/Truck (subtypes).
Why Other Options Are Incorrect:
* Option A (Strong entity) (Incorrect):Strong entitiesdo not rely on a supertype/subtype hierarchy.
* Option C (Associative entity) (Incorrect):Used toresolve many-to-many relationships, not supertype
/subtype relationships.
* Option D (Weak entity) (Incorrect):Weak entitiesdepend on a strong entity, but supertype-subtype relations useinheritance(not dependency).
Thus, the correct answer isIsA relationship, as it describes theinheritance hierarchybetweensupertypes and subtypes.

NEW QUESTION # 20
What is the role of a query processor in the database system architecture?

A. It writes log records before applying changes to the database.
B. It translates instructions into file system commands.
C. It uses information from the catalog to perform query optimization.
D. It sends results back to the application that requested the queries.

Answer: C

Explanation:
Aquery processoris responsible forquery optimization and executionin a database management system (DBMS). It analyzes SQL statements, optimizes execution plans, and ensures efficient retrieval of data.
* Option A (Correct):Thequery processoroptimizes queries by analyzing metadata from thesystem catalogto determine the best execution strategy.
* Option B (Incorrect):Logging transactionsbefore applying changes is the responsibility of the transaction manager.
* Option C (Incorrect):Translating instructions intofile system commandsis handled by thestorage manager, not the query processor.
* Option D (Incorrect):While the query processor helps retrieve results, thedatabaseengineandAPI layerare responsible for returning results to applications.

NEW QUESTION # 21
......

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Data-Management-Foundations Exam Dumps Provider Exam Reliable IT Certifications | WGU Data-Management-Foundations: WGU Data Management–Foundations Exam

WGU Data-Management-Foundations Exam Syllabus Topics:

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WGU Data Management – Foundations Exam Sample Questions (Q16-Q21):

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