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CompTIA Data+ Exam (2025) Sample Questions:

1. A data analyst needs to join together a table data source and a web API data source using Python. Which of the following is the best way to accomplish this task?

A) Convert the data from the API and database to a string format and convert them to pandas DataFrames that are then merged together.
B) Convert the data from the API and database to a TXT format and convert them to pandas DataFrames that are then merged together.
C) Convert the data from the API and database to a JSON format and convert them to pandas DataFrames that are then merged together.
D) Convert the data from the API and database to a varchar format and convert them to pandas DataFrames that are then merged together.

2. An administrator needs to design a table that will include foreign words. Which of the following is the best option for storing non-native language characters?

A) CHAR
B) CLOB
C) VARCHAR
D) NVARCHAR

3. A data analyst is creating a new dataset that involves bringing together the following datasets:
Name
ID
Date of birth
Frank
23525
3/19
Martha
11290
6/13
Ellen
12141
11/4
ID
Address
City
State
23525
1234 Harding
Chicago
IL
11040
935 Terrace Hills
Chino
CA
11290
2 Speedway
Miami
FL
Which of the following would be the output if the data analyst does a FULL JOIN?

A) Name
ID
Date of birth
Address
City
State
Frank
23525
3/19
1234 Harding
Chicago
IL
Martha
11290
6/13
2 Speedway
Miami
FL
Ellen
12141
11/4
11040
935 Terrace Hills
Chino
CA
B) Name
ID
Date of birth
Address
City
State
Frank
23525
3/19
1234 Harding
Chicago
IL
Martha
11290
6/13
935 Terrace Hills
Chino
CA
Ellen
12141
11/4
2 Speedway
Miami
FL
C) Name
ID
Date of birth
Address
City
State
Frank
23525
3/19
1234 Harding
Chicago
IL
Martha
11290
6/13
2 Speedway
Miami
FL
Ellen
12141
11/4
935 Terrace Hills
Chino
CA
D) Name
ID
Date of birth
Address
City
State
Frank
23525
3/19
1234 Harding
Chicago
IL
Martha
11290
6/13
935 Terrace Hills
Chino
CA
Ellen
12141
11/4
2 Speedway
Miami
FL

4. Which of the following is the best tool for creating a dynamic dashboard?

A) RStudio
B) Power BI
C) SAS
D) Excel

5. A data analyst is creating a pivot table for a large dataset for an upcoming board meeting. Which of the following is the purpose of the pivot table?

A) To summarize and analyze the data
B) To visualize the data in a dashboard
C) To organize the data for reporting
D) To retrieve and clean data from several sources

Solutions: