2025 WGU Data-Management-Foundations–High Pass-Rate Simulation Questions

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WGU Data Management – Foundations Exam Sample Questions (Q45-Q50):

NEW QUESTION # 45
Which entity in a table is a measurable object in the real world?

A. Tangible entity
B. Conceptual entity
C. Virtual entity
D. Logical entity

Answer: A

Explanation:
Atangible entityis a real-world object that can bemeasured and storedin a database.
Example Usage:
* In an inventory system,tangible entitiesinclude:
Products, Orders, Customers
Why Other Options Are Incorrect:
* Option A (Logical entity) (Incorrect):Exists logically butmay not have a physical presence(e.g., views, categories).
* Option C (Virtual entity) (Incorrect):Existsonly in queries or reports, not stored as real data.
* Option D (Conceptual entity) (Incorrect):Abstract idea used indesign modeling, not astored entity.
Thus, the correct answer isTangible entity, as it representsmeasurable, real-world objects.

NEW QUESTION # 46
Which main characteristic is used to differentiate between strong and weak entities in the process of database design?

A. Foreign key
B. Cardinality
C. Association
D. Primary key

Answer: D

Explanation:
Indatabase design, an entity is classified asstrong or weakbased on whether it has aprimary keythat uniquely identifies its records.
Differences Between Strong and Weak Entities:

CREATE TABLE Orders (
OrderID INT PRIMARY KEY,
CustomerID INT
);
CREATE TABLE OrderDetails (
OrderDetailID INT,
OrderID INT,
ProductID INT,
PRIMARY KEY (OrderDetailID, OrderID),
FOREIGN KEY (OrderID) REFERENCES Orders(OrderID)
);
* Orders is astrong entity(has OrderID as its own primary key).
* OrderDetails is aweak entity(depends on OrderID for uniqueness).
Why Other Options Are Incorrect:
* Option A (Association) (Incorrect):Associations describerelationshipsbut do not define strong/weak entities.
* Option C (Foreign key) (Incorrect):Weak entitiesdepend on foreign keys, butprimary keysdefine their status.
* Option D (Cardinality) (Incorrect):Cardinality definesrelationship constraintsbut doesnot differentiate entity types.
Thus, the correct answer isPrimary key, as it is the defining characteristic betweenstrong and weak entities.

NEW QUESTION # 47
Which product has an open-source license in addition to having a non-relational system?

A. Oracle Database
B. MySQL
C. SQL Server
D. MongoDB

Answer: D

Explanation:
MongoDB is aNoSQL (non-relational) databasethat isopen-sourceand supportsdocument-oriented storage
. It allows for flexible schema design and is optimized for big data applications.
* Option A (Correct):MongoDB is aNoSQL databasewith an open-sourceAGPLlicense, making it both free to use and non-relational.
* Option B (Incorrect):SQL Serveris arelational database(RDBMS) developed by Microsoft and isnot open-source.
* Option C (Incorrect):MySQLisopen-sourcebut is arelational database(RDBMS), not a NoSQL system.
* Option D (Incorrect):Oracle Databaseisrelationalandproprietary(not open-source).

NEW QUESTION # 48
Which action does the % operator accomplish in MySQL?

A. Subtracts a numeric value from another
B. Compares two numeric values for equality
C. Divides two numeric values and returns the remainder
D. Raises a numeric value to the power of another

Answer: C

Explanation:
The % operator in MySQL is known as themodulus operator. It returns theremainderof a division operation between two numbers.
Example:
sql
SELECT 10 % 3; -- Output: 1 (10 divided by 3 gives remainder 1)
* Option A (Incorrect):Raising a number to a power is done using the POW() function or