DA0-002 Visualization and Reporting Practice Question
Which THREE of the following are common mistakes when creating data visualizations? (Choose 3.)
⚠ Common exam trap
CompTIA often tests the misconception that adding visual flair (like 3D effects) improves a chart, when in reality it reduces accuracy; the trap here is that candidates may think 3D pie charts are acceptable because they look 'professional' or 'modern'.
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
✓
Using a 3D pie chart
3D pie charts distort the perception of proportions by adding a false depth dimension, making it difficult for viewers to accurately compare slice sizes. This violates the principle of data-ink ratio and is widely discouraged in data visualization best practices.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Choosing the correct chart type for the data
Why it's wrong here
This is a best practice.
- ✓
Using a 3D pie chart
Why this is correct
3D distorts angles and makes comparison harder.
- ✗
Labeling axes clearly
Why it's wrong here
This is a best practice, not a mistake.
- ✓
Using a non-zero baseline for bar charts
Why this is correct
Non-zero baseline can misrepresent magnitude.
- ✓
Truncating the y-axis to exaggerate differences
Why this is correct
Misleading because it magnifies small differences.
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