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CompTIA Data+ Exam (2025) Sample Questions:

1. A data analyst wants to use the following tables to find all the customers who have not placed an order:
Customers table
ID
Name
Address
Products table
ID
Name
Customer_ID
Which of the following SQL statements is the best way to accomplish this task?

A) SELECT * FROM PRODUCTS AS P LEFT JOIN CUSTOMERS AS C ON P.Customer_ID = C.ID WHERE P.Customer_ID IS NOT NULL
B) SELECT * FROM PRODUCTS AS P INNER JOIN CUSTOMERS AS C ON P.Customer_ID = C.ID WHERE (SELECT COUNT(P.) = 0)
C) SELECT * FROM CUSTOMERS AS C INNER JOIN PRODUCTS AS P ON C.ID = C.IDWHERE COUNT(P.) = 0
D) SELECT * FROM CUSTOMERS AS C LEFT JOIN PRODUCTS AS P ON C.ID = P.Customer_ID WHERE P.Customer_ID IS NULL

2. A data analyst needs to identify outliers from a given dataset. Which of the following visualizations is the best way to identify outliers?

A) Scatter plot
B) Box plot
C) Gantt chart
D) Waterfall chart

3. Given the following dataset:
Day
Number of Guests
Monday
455
Tuesday
346
Wednesday
382
Thursday
563
Friday
887
Saturday
934
Sunday
346
Which of the following is the mode?

A) 446
B) 455
C) 346
D) 559

4. Which of the following data sources makes online data consumption easier?

A) Web scraping
B) Application programming interface
C) Database
D) Data mart

5. A data analyst needs to create and deliver a dashboard that displays the company's financial transactions as they are updated. Which of the following delivery methods should the analyst consider? (Select two).

A) Real-time
B) Snapshot
C) Dynamic
D) Ad hoc
E) Static
F) Time series

Solutions: