DA0-002 Visualization and Reporting Practice Question
Exhibit
Refer to the exhibit. Tableau Workbook Log: Sheet: Sales by Region Mark Type: Map Latitude: [Region.Latitude] Longitude: [Region.Longitude] Color: SUM(Profit) Tooltip: Region, SUM(Sales), SUM(Profit) Error: Some regions display as null.
A data analyst is troubleshooting a map visualization that shows null values for some regions. Which TWO actions should the analyst take to resolve the issue?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Check that latitude and longitude fields are properly geocoded.
Improper geocoding of latitude and longitude fields can result in null values on a map. Option B is correct because missing region names in the data source cause nulls; verifying and correcting the data source resolves the issue. Option C is incorrect because filtering out nulls hides the problem without fixing the underlying data. Option D is incorrect because changing the mark type does not address missing data. Option E is incorrect because removing color encoding only alters the visual appearance, not the data integrity.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Check that latitude and longitude fields are properly geocoded.
Why this is correct
Improper geocoding can cause null regions; verifying geocoding resolves the issue.
- ✓
Verify that the data source includes all region names.
Why this is correct
Missing region names in the data source would cause nulls; ensuring completeness fixes it.
- ✗
Add a filter to exclude null values.
Why it's wrong here
Filtering out nulls hides the problem rather than resolving the underlying data issue.
- ✗
Change the mark type from Map to Pie.
Why it's wrong here
Changing mark type does not fix missing data; nulls would still appear.
- ✗
Remove the color encoding from profit.
Why it's wrong here
Removing color encoding hides the symptom but does not fix the null values.
Visual reference
Go deeper
Related to this question
About these practice questions
Courseiva writes every DA0-002 question from scratch — 986 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This DA0-002 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DA0-002 exam.