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WGU Data Management – Foundations Exam Sample Questions (Q33-Q38):

NEW QUESTION # 33
Which operator defines the field that the index is using in a CREATE TABLE statement?

A. CHECK
B. IN
C. UNIQUE
D. ON

Answer: D

Explanation:
TheONkeyword specifies the field used by anindexwhen creating it in SQL.
Example Usage:
sql
CREATE INDEX idx_employee_name
ON Employees(Name);
* Here, an indexidx_employee_nameis createdon the Name column.
* Thisimproves query performancewhen filtering by Name.
Why Other Options Are Incorrect:
* Option B (IN) (Incorrect):Used in queries to match values in a set, not for indexing.
* Option C (UNIQUE) (Incorrect):Ensures a column has unique values but doesnot define an index field.
* Option D (CHECK) (Incorrect):Used forvalidating column values, not for indexing.
Thus, the correct answer isON, as it defines thecolumn on which an index is created.

NEW QUESTION # 34
Which SELECT statement uses valid syntax for SQL?

A. SELECT column1, column2 FROM table_name;
B. SELECT column1, column2 WHERE condition FROM table_name;
C. SELECT ALL column1, column2 FROM table_name;
D. SELECT "column name", "column name" FROM "table name" WHERE "column name"

Answer: A

Explanation:
Avalid SELECT statementin SQL follows this basic syntax:
sql
SELECT column1, column2
FROM table_name
WHERE condition;
The correct optionDfollows this syntaxcorrectly.
Why Other Options Are Incorrect:
* Option A (Incorrect):SQL does not usedouble quotes(") around column/table names unless explicitly required in some databases.
* Option B (Incorrect):The WHERE clausemust appear after the FROM clause.
* Option C (Incorrect):ALL isnota valid keyword in standard SQL queries.
Thus,Option Dfollows the correct SQL syntax.

NEW QUESTION # 35
Which type of entity only exists in a logical sense?

A. Tangible entity
B. Concrete entity
C. Intangible entity
D. Physical entity

Answer: C

Explanation:
Anintangible entityis an entity that does not have a physical presence but still holds meaning in a database.
These entities representconcepts, relationships, or abstract datathat exist in a logical sense.
Example Usage in Databases:
* Customer Loyalty Status (Gold, Silver, Bronze)
* Theloyalty levelis anintangible entitysince it is derived from other data (purchase history).
* Online User Sessions
* Asession IDexistslogically in the systembut does not have a tangible presence like a product or employee.
Why Other Options Are Incorrect:
* Option A (Concrete entity) (Incorrect):No such formal term in database design.
* Option B (Tangible entity) (Incorrect):Represents somethingphysical, like anemployeeorproduct.
* Option D (Physical entity) (Incorrect):Refers todata stored on disk, like database tables or indexes.
Thus, the correct answer isIntangible entity, as it only exists in a logical sense within the database.

NEW QUESTION # 36
Which designation is an individual value, such as a salary?

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

Answer: D

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 # 37
Which statement is associated with two separate entities?

A. Relationship
B. Reflexive relationship
C. Attribute
D. Entity type

Answer: A

Explanation:
Arelationshipin an ER model defineshow two separate entities interact.
Example Usage:
A screenshot of a computer AI-generated content may be incorrect.

CREATE TABLE Customers (
CustomerID INT PRIMARY KEY,
Name VARCHAR(50)
);
CREATE TABLE Orders (
OrderID INT PRIMARY KEY,
CustomerID INT,
FOREIGN KEY (CustomerID) REFERENCES Customers(CustomerID)
);
* Customers and Orders are separate entities, related via CustomerID.
Why Other Options Are Incorrect:
* Option A (Reflexive relationship) (Incorrect):Used forself-referencing entities, not two different entities.
* Option B (Entity type) (Incorrect):Defines aclass of objects, but does not establish relationships.
* Option D (Attribute) (Incorrect):Attributesdescribeentities but do not connect them.
Thus, the correct answer isRelationship, as it connectstwo separate entities.

NEW QUESTION # 38
......

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