DA0-002 Visualization and Reporting Practice Question
A sales dashboard shows a map with many overlapping markers in the same city, making it hard to read. What is the best improvement?
⚠ Common exam trap
It's easy for candidates to choose tooltips (Option A) thinking interactivity solves the problem, but the question asks for the 'best improvement' to readability, and tooltips do not address the fundamental issue of overlapping markers obscuring the visualization.
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
✓
Aggregate the data by region and use a choropleth map
Aggregating sales data by region and using a choropleth map eliminates visual clutter from overlapping markers by shading entire geographic areas based on a metric (e.g., total sales). This approach leverages spatial aggregation to provide a clear, high-level view of regional performance, which is the best practice when individual point markers become unreadable due to density.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Add tooltips to show details on hover
Why it's wrong here
Tooltips help individual points but still clutter the map.
- ✓
Aggregate the data by region and use a choropleth map
Why this is correct
Aggregating reduces density and choropleth shows region-level values.
- ✗
Use a bubble chart instead of a map
Why it's wrong here
Bubble chart still has overlap on a map.
- ✗
Use different marker colors for each store
Why it's wrong here
Colors don't reduce overlap.
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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.