DA0-002 Visualization and Reporting Practice Question
An analyst creates a dashboard with a large amount of decorative graphics and background images. According to CompTIA Data+, which design principle is being violated?
⚠ Common exam trap
Test-takers frequently confuse 'decorative graphics' with 'visual hierarchy' or 'color coding,' but CompTIA Data+ specifically tests the data-ink ratio as a principle for minimizing non-data elements to enhance readability.
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
✓
Data-ink ratio
The data-ink ratio, a concept from Edward Tufte, states that a visualization should maximize the proportion of ink used to represent actual data relative to total ink used. By adding excessive decorative graphics and background images, the analyst reduces this ratio, making the dashboard less efficient and potentially obscuring the data. CompTIA Data+ emphasizes minimizing non-data ink to improve clarity and insight extraction.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Visual hierarchy
Why it's wrong here
Visual hierarchy concerns arranging elements so the most important metrics draw attention first. Decorative graphics and background images instead clutter the canvas with non-data ink, lowering the data-ink ratio. Visual hierarchy would be the answer if key KPIs were buried beneath less important widgets.
- ✓
Data-ink ratio
Why this is correct
Decorative graphics and background images consume ink without conveying data, lowering the data-ink ratio that Tufte defines as data-ink divided by total ink. CompTIA Data+ expects dashboards to maximise this ratio by removing non-data pixels, so heavy ornamentation directly violates the principle the stem describes.
- ✗
Appropriate precision
Why it's wrong here
Decorative graphics and background images violate the principle of maximising the data-ink ratio, not precision. Precision concerns rounding and significant figures in displayed values. It would be the correct answer if the dashboard showed figures such as 47.38291% where two decimal places suffice.
- ✗
Consistent color coding
Why it's wrong here
Consistent colour coding governs using the same hue for the same category across charts. Decorative graphics and background images instead reduce the data-to-ink ratio by adding non-data pixels. Colour coding would be the answer if the same metric appeared in different colours on separate dashboard tiles.
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