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CompTIA Data+ Exam (2025) Sample Questions:

1. Which of the following best describes an assessment a data analyst would use to validate that the number of records in a dataset matches the expected results?

A) Health check
B) Stress test
C) Unit test
D) Source control

2. Which of the following is the best reason for a company to use a CSV file to share data instead of an Excel file?

A) CSV files are easier to change in text editors.
B) CSV files are smaller in size.
C) CSV files are not vendor-specific.
D) CSV files can store different types of encoding.

3. A data analyst receives a request for the current employee head count and runs the following SQL statement:
SELECT COUNT(EMPLOYEE_ID) FROM JOBS
The returned head count is higher than expected because employees can have multiple jobs. Which of the following should return an accurate employee head count?

A) SELECT DISTINCT COUNT(EMPLOYEE_ID) FROM JOBS
B) SELECT COUNT(DISTINCT EMPLOYEE_ID) FROM JOBS
C) SELECT JOB_TYPE, COUNT(DISTINCT EMPLOYEE_ID) FROM JOBS
D) SELECT JOB_TYPE, COUNT DISTINCT(EMPLOYEE_ID) FROM JOBS

4. Which of the following best describes the reason an analyst would reference a data dictionary versus a source's metadata?

A) To find the content and specific attributes for a dataset
B) To find a summary of basic information about the dataset
C) To gather information and resources about the data
D) To gather information about the availability of the data

5. A data analyst pulls a table similar to the following one:
ID
Type
TypeID
Phone
1
Full Time
Full Time 1
Mobile
2
Part Time
Part Time 2
Work
3
Full Time
Full Time 3
Mobile
Which of the following best explains the data issue with TypeID?

A) Duplication
B) Redundancy
C) Missing data
D) Outlier

Solutions: