DA0-002 Visualization and Reporting Practice Question
A data analyst is building a report that will be refreshed weekly and distributed as a PDF to stakeholders. The report includes a table of sales by region and a bar chart of top products. Stakeholders have requested that the report be accessible on mobile devices. Which adjustment should the analyst make to ensure the report is mobile-friendly?
⚠ Common exam trap
The trap here is thinking that simplifying by removing data or changing chart types is the best way to achieve mobile-friendliness, rather than adapting the design responsively.
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
✓
Use a responsive design that adjusts layout and font sizes based on screen size.
To make the report mobile-friendly, the analyst should implement responsive design, which dynamically adjusts the layout, chart sizes, and font sizes to fit various screen dimensions. This preserves all data while enhancing readability on smaller devices, directly meeting the stakeholders' needs without sacrificing content.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Increase the number of data points shown in the bar chart to provide more detail.
Why it's wrong here
Adding more data points to the bar chart would make it more cluttered and difficult to read on a small mobile screen. Mobile-friendly design emphasizes simplicity and focus on key insights. More data points would require scrolling or zooming, reducing usability. Therefore, this adjustment would not achieve the goal of mobile accessibility.
- ✗
Remove the table of sales by region to simplify the report.
Why it's wrong here
Removing the table would eliminate valuable data that stakeholders likely need. Simplification should not come at the cost of removing key information. Instead, the analyst should optimize the presentation of the table for mobile, such as allowing horizontal scrolling or collapsing rows. Deleting content is not a valid solution for mobile-friendliness.
- ✗
Convert the bar chart to a pie chart to save space.
Why it's wrong here
Pie charts are not inherently more space-efficient than bar charts and are often harder to read on mobile devices due to small slices and labels. They also are not ideal for comparing many categories. Converting to a pie chart would not improve mobile-friendliness and could reduce clarity. Thus, this is not a recommended adjustment.
- ✓
Use a responsive design that adjusts layout and font sizes based on screen size.
Why this is correct
Responsive design ensures that the report's layout, charts, and text adapt to different screen sizes, making it readable on mobile devices without excessive scrolling or zooming. This directly addresses the stakeholders' request for mobile accessibility. By implementing responsive design principles, the analyst can maintain data integrity while improving user experience across devices.
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Last reviewed September 2026 · checked against the official CompTIA exam blueprint
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