DA0-002 Visualization and Reporting Practice Question
A dashboard shows sales by region using a map with color intensity. Users complain that two regions with very different sales appear nearly the same color. What is the most likely cause?
⚠ Common exam trap
The trap here is that candidates may attribute the problem to hardware limitations (monitor resolution) or user physiology (color blindness) rather than recognizing it as a fundamental data visualization design flaw in the color scale selection.
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
✓
The color scale uses a sequential palette with insufficient contrast
The issue is that the color scale uses a sequential palette with insufficient contrast between adjacent data values. When the color gradient is too narrow or uses similar hues, regions with significantly different sales figures map to nearly identical colors, making the visualization ineffective. This is a common problem in data visualization when the color mapping does not span the full range of the data or uses a perceptually uniform palette poorly.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The map projection is distorted
Why it's wrong here
Projection distortion alters geographic shape and area, not the colour assigned to a value, so two regions would still be shaded by their data. Projection choice matters when comparing land areas across latitudes, not when encoding sales magnitudes.
- ✓
The color scale uses a sequential palette with insufficient contrast
Why this is correct
A sequential palette maps values onto one hue's lightness ramp, so two regions with very different sales can land on similar shades when the scale's contrast is too low or its range poorly fitted to the data. Widening the lightness range or switching to a diverging scale restores the visible difference.
- ✗
The monitor resolution is too low
Why it's wrong here
Low monitor resolution affects pixel sharpness and label legibility, not the colour values rendered for each region. Resolution is the relevant factor when fine detail or text becomes unreadable, whereas the complaint concerns colour encoding of numeric values.
- ✗
Users are color blind
Why it's wrong here
Colour blindness affects hue discrimination, not the luminance ramp a sequential map uses, so two regions can still look identical to users with normal vision. It is tempting because colour-blindness testing is a genuine accessibility step for categorical palettes, but the stem describes intensity overlap, which stems from data scaling or palette choice.
Go deeper
Related to this question
About these practice questions
Courseiva writes every DA0-002 question from scratch — 1,004 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.