2025 DATA-MANAGEMENT-FOUNDATIONS VALID TEST CAMP | RELIABLE 100% FREE WGU DATA MANAGEMENT–FOUNDATIONS EXAM EXAM ACTUAL QUESTIONS

2025 Data-Management-Foundations Valid Test Camp | Reliable 100% Free WGU Data Management–Foundations Exam Exam Actual Questions

2025 Data-Management-Foundations Valid Test Camp | Reliable 100% Free WGU Data Management–Foundations Exam Exam Actual Questions

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WGU Data Management – Foundations Exam Sample Questions (Q42-Q47):

NEW QUESTION # 42
Which keyword can be used to combine two results into one table?

  • A. MERGE
  • B. CONSOLIDATE
  • C. INTEGRATE
  • D. UNION

Answer: D

Explanation:
TheUNIONkeyword in SQL is used tocombine the resultsof two or more SELECT queries into asingle result setwhile removing duplicate rows.
Example:
sql
SELECT Name FROM Employees
UNION
SELECT Name FROM Managers;
* Option A (Correct):UNION combines results from multiple queries into one set,removing duplicates.
* Option B (Incorrect):MERGE is not a valid SQL keyword for combining result sets (it is used insome database systems for data merging).
* Option C (Incorrect):INTEGRATE is not a SQL keyword.
* Option D (Incorrect):CONSOLIDATE is not an SQL keyword.


NEW QUESTION # 43
Which SQL command uses the correct syntax to add a new employee "John Doe" to the Employee table?

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

Answer: D

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 # 44
Which syntax feature classifies the explicit string, numeric, or binary values used in SQL queries?

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

Answer: C

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 # 45
Which keyword can be used as a clause in an ALTER TABLE statement?

  • A. CHANGE
  • B. DELETE
  • C. AGGREGATE
  • D. STOP

Answer: A

Explanation:
TheALTER TABLEstatement is used to modify an existing database table structure. One common clause is CHANGE, which allows renaming a column and modifying its data type.
Example:
sql
ALTER TABLE Employees CHANGE COLUMN OldName NewName VARCHAR(50);
* Option A (Incorrect):DELETE is used to removerows, not alter table structure.
* Option B (Correct):CHANGE is avalid clausefor renaming and modifying columns in MySQL and some other databases.
* Option C (Incorrect):STOP is not a valid SQL keyword for altering tables.
* Option D (Incorrect):AGGREGATE refers to functions like SUM() and AVG(), not table alterations.


NEW QUESTION # 46
Which product has an open-source license in addition to having a non-relational system?

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

Answer: B

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 # 47
......

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