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WGU Data Management – Foundations Exam Sample Questions (Q51-Q56):

NEW QUESTION # 51
Which designation is an individual value, such as a salary?

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

Answer: A

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 # 52
Which optional clause is used to reject inserts and updates that do not satisfy the WHERE clause of a view query?

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

Answer: A

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 # 53
Which description defines a data type?

A. It has a name and a varying set of rows.
B. It is a named set of values.
C. It is an unnamed tuple of values.
D. It has values corresponding to columns.

Answer: B

Explanation:
Adata typedefines the kind of data a column can store in a database. It ensures data consistency and efficient storage.
* Option A (Correct):A data type is anamed set of values, such asINTEGER, VARCHAR, DATE, etc.
* Option B (Incorrect):A tuple refers to arowin a relational database, not a data type.
* Option C (Incorrect):Data typesdefinecolumn values, but they do not correspond directly to columns.
* Option D (Incorrect):Data types do not have avaryingset of rows; they define attributes for columns.

NEW QUESTION # 54
Where does a primary key traditionally appear in a table?

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

Answer: B

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 # 55
Which primary key values consist of a single field only?

A. Simple
B. Stable
C. Meaningless
D. Partition

Answer: A

Explanation:
Asimple primary keyconsists ofonly one columnthat uniquely identifies each row in a table.
Example Usage:
sql
CREATE TABLE Students (
StudentID INT PRIMARY KEY,
Name VARCHAR(50)
);
* StudentIDis asimple primary keybecause it consists of only one field.
Why Other Options Are Incorrect:
* Option B (Partition) (Incorrect):Refers topartitioned tables, which divide data for performance reasons butare not related to primary keys.
* Option C (Stable) (Incorrect):This is not a recognized term in database keys.
* Option D (Meaningless) (Incorrect):Primary keys are oftenmeaningless (e.g., auto-incremented IDs)
, but this isnot a term used to describe their structure.
Thus, the correct answer isSimple, as asingle-field primary keyis referred to as asimple primary key.

NEW QUESTION # 56
......

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Exam WGU Data-Management-Foundations Bootcamp | Reliable Data-Management-Foundations Dumps Free

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WGU Data Management – Foundations Exam Sample Questions (Q51-Q56):

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