DA0-002 Visualization and Reporting Practice Question
Which THREE actions improve the accessibility of data visualizations for users with visual impairments? (Select exactly three.)
⚠ Common exam trap
DA0-002 often tests the misconception that color alone can convey information or that animations enhance accessibility, when in fact both are accessibility anti-patterns.
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
✓
Provide text alternatives for charts (e.g., data tables).
Option A is correct because providing text alternatives such as data tables gives screen reader users and others who cannot perceive the chart a non-visual equivalent of the data, satisfying WCAG 1.1.1 Non-text Content. Option C is correct because clear, descriptive labels (titles, axis names, legends, and data point labels) let users understand what the visualization represents without relying on visual inference or color alone. Option D is correct because sufficient color contrast between text/graphical elements and their background meets WCAG 1.4.3 and 1.4.11, making charts legible for users with low vision or color vision deficiencies. Option B does not belong because using only color to convey information fails WCAG 1.4.1 Use of Color and excludes users who cannot distinguish those colors. Option E does not belong because animated transitions can trigger vestibular issues and distract users, and they do not improve accessibility of the underlying data.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Provide text alternatives for charts (e.g., data tables).
Why this is correct
Text alternatives such as data tables expose the underlying values in a machine-readable form, letting screen readers convey the chart's content to blind users. This satisfies the accessibility requirement by removing dependence on the graphical rendering.
- ✗
Use only color to convey information.
Why it's wrong here
Encoding information solely through colour excludes users with colour vision deficiency and screen readers, since hue carries the entire meaning. Colour-only encoding is tempting because it produces clean, uncluttered charts, and would be acceptable where redundant labels, patterns or text also convey the same distinctions.
- ✓
Use clear and descriptive labels.
Why this is correct
Clear, descriptive labels name axes, series and data points explicitly, so screen reader users and those with low vision can interpret the visualisation without relying on colour or position alone. This satisfies the accessibility requirement for non-visual comprehension.
- ✓
Ensure sufficient color contrast.
Why this is correct
Sufficient colour contrast ensures chart elements remain distinguishable for users with low vision or colour vision deficiency, satisfying the accessibility requirement. Contrast ratios between text, data marks and backgrounds determine whether information is perceivable at all.
- ✗
Add animated transitions between views.
Why it's wrong here
Animated transitions add motion that can trigger vestibular discomfort and distract screen-reader users, while conveying no information to non-visual users. Animation is tempting because it can clarify state changes for sighted audiences, and would suit demonstrating temporal or sequential relationships rather than improving accessibility for visual impairments.
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Last reviewed September 2026 · checked against the official CompTIA exam blueprint
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