DA0-002 Visualization and Reporting Practice Question
A business analyst wants to compare the proportion of total sales contributed by each product category in the current year. Which visualization is most suitable?
⚠ Common exam trap
DA0-002 often tests whether candidates over-apply pie charts to any categorical data; the trap is recognizing that 'proportion of total' specifically justifies a pie chart, while 'compare values' would not.
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
✓
Pie chart
A pie chart is designed to show how a whole is divided into proportional parts, making it the natural fit for comparing each product category's share of total sales. Each slice's angle directly encodes the category's percentage contribution, which is exactly what the analyst needs. For a single-period composition question, pie charts communicate proportions intuitively.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Pie chart
Why this is correct
A pie chart maps each category to a slice whose angle is proportional to its share of the whole, directly encoding the part-to-whole relationship the analyst needs. It satisfies the constraint of comparing each product category's contribution to total sales in a single, immediately readable view.
- ✗
Scatter plot
Why it's wrong here
A scatter plot positions individual points along two numeric axes to reveal correlation between paired variables, so it cannot display parts of a whole. It is tempting because it excels at showing relationships between two continuous measures, such as advertising spend against revenue, which would be the correct choice when investigating whether one variable predicts another.
- ✗
Line chart
Why it's wrong here
A line chart plots a continuous measure against time or an ordered axis, so it cannot show each category's share of a single total. It is the right choice for trends across periods, not part-to-whole comparison within one year.
- ✗
Histogram
Why it's wrong here
A histogram bins a single continuous variable to show its frequency distribution, so it cannot represent categorical proportions of total sales. It would be correct for examining the distribution of order values or transaction amounts, not category contribution.
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Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official CompTIA exam blueprint
This DA0-002 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DA0-002 exam.