WGU D465 DATA APPLICATIONS EXAM OA EXAM WITH CORRECT ACTUAL QUESTIONS AND CORRECTLY WELL DEFINED ANSWERS LATEST ALREADY GRADED A+

WGU D465 DATA APPLICATIONS EXAM
OA EXAM WITH CORRECT ACTUAL
QUESTIONS AND CORRECTLY WELL
DEFINED ANSWERS LATEST ALREADY
GRADED A+



Question 1


Which SQL clause is used to filter records after aggregation?


A. WHERE
B. GROUP BY
C. HAVING
D. ORDER BY


Explanation:
The HAVING clause is used to filter results after aggregation
functions (like COUNT, SUM) are applied. WHERE filters
rows before aggregation.

,Question 2


Which of the following is a primary key characteristic?


A. Can contain duplicate values
B. Can be NULL
C. Uniquely identifies each row
D. Is optional in a table


Explanation:
A primary key must uniquely identify each record and
cannot contain NULL or duplicate values.


Question 3


Which SQL function returns the number of rows?


A. SUM()
B. COUNT()
C. AVG()

,D. TOTAL()


Explanation:
COUNT() returns the number of rows that match a specified
condition.


Question 4


Which data type is best for storing text?


A. INT
B. DATE
C. VARCHAR
D. FLOAT


Explanation:
VARCHAR stores variable-length strings, making it ideal for
text data.


Question 5

, What does a JOIN do in SQL?


A. Deletes rows
B. Combines data from multiple tables
C. Sorts data
D. Filters columns


Explanation:
JOIN merges rows from two or more tables based on a
related column.


Question 6


Which JOIN returns all records from the left table?


A. INNER JOIN
B. RIGHT JOIN
C. LEFT JOIN
D. FULL JOIN


Explanation: