DA0-002 Visualization and Reporting Practice Question
A data analyst is creating a report that compares the performance of five different marketing campaigns over the past year. The analyst wants to show both the total revenue generated by each campaign and the proportion of total revenue that each campaign represents. Which combination of visualizations is most effective for this purpose?
⚠ Common exam trap
The trap here is selecting a single chart that attempts to show both total and proportion, when often two complementary charts are clearer, especially for a small number of categories.
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
✓
A bar chart showing total revenue by campaign and a pie chart showing the percentage of total revenue for each campaign.
The most effective combination is a bar chart for total revenue and a pie chart for proportion. A bar chart enables accurate comparison of revenue totals across campaigns, while a pie chart clearly illustrates each campaign's share of the total when there are only five categories. This dual approach directly addresses both analytical goals without requiring viewers to perform mental calculations.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
A treemap showing revenue by campaign, with rectangle sizes proportional to revenue.
Why it's wrong here
A treemap can show part-to-whole relationships through rectangle areas, and it can display total revenue via area size. However, treemaps are less effective for precise comparison of totals than bar charts, and they can be harder to interpret for audiences unfamiliar with them. While it addresses proportion, it does not clearly show exact total revenue values, and a single treemap may not suffice for both tasks.
- ✗
A line chart showing revenue trends for each campaign over the year and a scatter plot showing revenue versus campaign cost.
Why it's wrong here
A line chart is ideal for showing trends over time, but the requirement is to compare total revenue and proportion of total revenue, not trends. A scatter plot of revenue versus cost addresses a different question (efficiency), not proportion. Neither chart directly shows the proportion of total revenue that each campaign represents, so this combination fails to meet the stated goals.
- ✓
A bar chart showing total revenue by campaign and a pie chart showing the percentage of total revenue for each campaign.
Why this is correct
A bar chart is excellent for comparing total revenue across campaigns, as it allows precise comparison of lengths. A pie chart, while limited for many categories, effectively shows part-to-whole relationships for a small number of categories. With five campaigns, a pie chart can clearly display each campaign's proportion of total revenue. Together, they meet both requirements.
- ✗
A stacked bar chart showing revenue by campaign, with each bar segmented by month.
Why it's wrong here
A stacked bar chart can show total revenue per campaign and monthly breakdown, but it does not clearly show the proportion of total revenue that each campaign represents. The segments represent monthly contributions, not campaign shares of the overall total. Viewers would need to mentally calculate proportions, which defeats the purpose of showing proportion directly.
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Last reviewed September 2026 · checked against the official CompTIA exam blueprint
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