HOT EXAMCOLLECTION DATA-MANAGEMENT-FOUNDATIONS DUMPS TORRENT - THE BEST WGU WGU DATA MANAGEMENT–FOUNDATIONS EXAM - DATA-MANAGEMENT-FOUNDATIONS STUDY TOOL

HOT Examcollection Data-Management-Foundations Dumps Torrent - The Best WGU WGU Data Management–Foundations Exam - Data-Management-Foundations Study Tool

HOT Examcollection Data-Management-Foundations Dumps Torrent - The Best WGU WGU Data Management–Foundations Exam - Data-Management-Foundations Study Tool

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WGU Data Management – Foundations Exam Sample Questions (Q53-Q58):

NEW QUESTION # 53
Which object relates an entity to itself in an entity-relationship model?

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

Answer: A

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 # 54
Which optional clause is used to reject inserts and updates that do not satisfy the WHERE clause of a view query?

  • A. BASE TABLE
  • B. MATERIALIZED VIEW
  • C. JOIN VIEWS
  • D. WITH CHECK OPTION

Answer: D

Explanation:
When a VIEW is created in SQL, users mayinsert or updatedata through that view. However, if a row is inserted or updated in such a way that itviolates the conditionof the VIEW's WHERE clause, it can lead to inconsistencies.
Topreventsuch unwanted modifications,SQL provides the WITH CHECK OPTION clause.
How WITH CHECK OPTION Works:
* Ensures thatany new data (INSERT/UPDATE) still fits within the defined constraints of the VIEW.
* If a user tries to insert or update a row that would not appear in the VIEW,the operation isrejected.
Example:
sql
CREATE VIEW HighSalaryEmployees AS
SELECT * FROM Employees WHERE Salary > 50000
WITH CHECK OPTION;
Now, if someone attempts:
sql
INSERT INTO HighSalaryEmployees (ID, Name, Salary)
VALUES (101, 'Alice', 30000);
Thisfailsbecause 30000 does not satisfy Salary > 50000.
Why Other Options Are Incorrect:
* Option B (Incorrect):JOIN VIEWS isnot a valid SQL clause.
* Option C (Incorrect):MATERIALIZED VIEW refers tostored viewsin some databases, but it doesnot reject incorrect inserts/updates.
* Option D (Incorrect):BASE TABLE refers to theoriginal table from which a VIEW is created.
Thus, the correct answer is WITH CHECK OPTION, whichensures that only valid data modifications occur.


NEW QUESTION # 55
Which SQL command uses the correct syntax to add a new employee "John Doe" to the Employee table?

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

Answer: A

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 # 56
Which syntax feature classifies the explicit string, numeric, or binary values used in SQL queries?

  • A. Keywords
  • B. Literals
  • C. Comments
  • D. Identifiers

Answer: B

Explanation:
In SQL,literalsrepresent explicit values such asnumbers, strings, or binary datadirectly written into queries.
For example:
SELECT * FROM Employees WHERE Salary > 50000;
Here, 50000 is anumeric literal.
* Option A (Correct):Literalsare explicit values used in SQL queries, such as 123, 'John Doe', and TRUE.
* Option B (Incorrect):Commentsare non-executable text used for documentation within SQL code, typically denoted by -- or /* ... */.
* Option C (Incorrect):Identifiersare names oftables, columns, or other database objects, such as EmployeeID.
* Option D (Incorrect):Keywordsare reserved words in SQL (e.g., SELECT, FROM, WHERE) that define operations and syntax.


NEW QUESTION # 57
Which statement is associated with two separate entities?

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

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 # 58
......

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