TESTPDF WGU DATA-MANAGEMENT-FOUNDATIONS EXAM QUESTIONS ARE VALID AND VERIFIED BY SUBJECT MATTERS EXPERTS

TestPDF WGU Data-Management-Foundations Exam Questions are Valid and Verified By Subject Matters Experts

TestPDF WGU Data-Management-Foundations Exam Questions are Valid and Verified By Subject Matters Experts

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Tags: Study Materials Data-Management-Foundations Review, Data-Management-Foundations Exam Cram Pdf, Data-Management-Foundations Latest Materials, Exam Data-Management-Foundations Consultant, Data-Management-Foundations Valid Study Guide

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We are conscious of the fact that most of the candidates have a tight schedule which makes it tough to prepare for the WGU Data Management – Foundations Exam exam preparation. TestPDF provides you WGU Data-Management-Foundations Exam Questions in 3 different formats to open up your study options and suit your preparation tempo.

WGU Data Management – Foundations Exam Sample Questions (Q12-Q17):

NEW QUESTION # 12
How can a primary key constraint be added after the table is created?

  • A. By using an ALTER clause
  • B. By using an INSERT INTO clause
  • C. By using an UPDATE clause
  • D. By using the CREATE TABLE statement

Answer: A

Explanation:
Toadd a primary key constraint after table creation, we use theALTER TABLEstatement.
Example Usage:
sql
ALTER TABLE Employees
ADD CONSTRAINT PK_Employees PRIMARY KEY (EmpID);
* Thisaddsa primary key to the EmpID columnafter the table was created.
Why Other Options Are Incorrect:
* Option B (CREATE TABLE) (Incorrect):Used for defining constraintsduringtable creation, not after.
* Option C (UPDATE) (Incorrect):Modifiesrow values, not constraints.
* Option D (INSERT INTO) (Incorrect):Used toadd datato a table, not modify constraints.
Thus, the correct answer isALTER TABLE, as itmodifies table structure to add a primary key constraint.


NEW QUESTION # 13
Which property of an entity can become a column in a table?

  • A. Non-null values
  • B. Modality
  • C. Attribute
  • D. Uniqueness

Answer: C

Explanation:
Indatabase design,attributesof an entity becomecolumnsin a relational table.
Example Usage:
For anEmployee entity, attributes might include:

CREATE TABLE Employees (
EmployeeID INT PRIMARY KEY,
Name VARCHAR(50),
Salary DECIMAL(10,2),
DepartmentID INT
);
* Eachattribute(e.g., Name, Salary) becomes acolumnin the table.
Why Other Options Are Incorrect:
* Option A (Modality) (Incorrect):Describesoptional vs. mandatoryrelationships, not table structure.
* Option B (Uniqueness) (Incorrect):Ensuresdistinct valuesbutis not a column property.
* Option D (Non-null values) (Incorrect):Ensures thatcolumns must contain databut doesnot define attributes.
Thus, the correct answer isAttribute, as attributes of entities becometable columns.


NEW QUESTION # 14
Which object relates an entity to itself in an entity-relationship model?

  • A. Attribute
  • B. Repository
  • C. Reflexive relationship
  • D. Relationship instance

Answer: C

Explanation:
Areflexive relationship(also called aunary relationship) occurs when anentity is related to itself.
Example Usage:
A screenshot of a computer AI-generated content may be incorrect.

CREATE TABLE Employees (
EmpID INT PRIMARY KEY,
Name VARCHAR(50),
ManagerID INT,
FOREIGN KEY (ManagerID) REFERENCES Employees(EmpID)
);
* ManagerIDrefers to another employeewithin the same table.
Why Other Options Are Incorrect:
* Option A (Repository) (Incorrect):A data storage structure, not a relationship type.
* Option B (Relationship instance) (Incorrect):Describesa specific connection between entities, not a reflexive relationship.
* Option D (Attribute) (Incorrect):Attributes storecharacteristics, butdo not define relationships.
Thus, the correct answer isReflexive relationship, as it relates an entity to itself.


NEW QUESTION # 15
Where does a primary key traditionally appear in a table?

  • A. In the last visible column
  • B. In the table header
  • C. In the top row
  • D. In the first column

Answer: D

Explanation:
Bydatabase design conventions, theprimary key is usually placed in the first columnof a table to make it easy to identify and reference.
Example Usage:
sql
CREATE TABLE Employees (
EmpID INT PRIMARY KEY, -- First column (convention)
Name VARCHAR(50),
Salary DECIMAL(10,2)
);
* EmpID is placed as the first columnfor clarity and quick access.
Why Other Options Are Incorrect:
* Option A (In the table header) (Incorrect):Table headers onlydisplay column names, they do not contain values.
* Option C (In the top row) (Incorrect):Thetop row contains data, not theprimary key definition.
* Option D (In the last visible column) (Incorrect):While technically possible,placing a primary key at the endisuncommonin database design.
Thus, the correct answer isIn the first column, as this is the standard convention in relational databases.


NEW QUESTION # 16
What is the role of the database administrator?

  • A. The database administrator is a consumer of data in a database.
  • B. The database administrator is responsible for securing the database system against unauthorized users.
  • C. The database administrator develops computer programs that utilize a database.
  • D. The database administrator determines the format of each data element and the overall database structure.

Answer: B

Explanation:
ADatabase Administrator (DBA)is responsible for the management, security, and performance of a database system. This includes controlling access to data, ensuring database integrity, optimizing performance, managing backups, and protecting the system from unauthorized access.
* Option A (Incorrect):A DBA is not just a consumer of data but is primarily responsible for the database's management.
* Option B (Correct):Security is one of the key responsibilities of a DBA, including enforcing user access controls and implementing encryption and authentication mechanisms.
* Option C (Incorrect):While DBAs work with data structures, it is typically the role of adata architect ordatabase designerto define data formats and schema structures.
* Option D (Incorrect):Developing application programs that interact with the database is typically the role ofsoftware developersordatabase programmers, not DBAs.


NEW QUESTION # 17
......

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