DA0-002 Visualization and Reporting Practice Question
A data analyst is creating a dashboard for a retail company. The dashboard should provide insights into sales performance across multiple dimensions. Which TWO chart types are best suited for showing the contribution of each product category to total sales?
⚠ Common exam trap
Candidates often choose a line chart (Option D) for any sales data because they associate sales with trends, overlooking that the question specifically asks for contribution to total sales, not change over time.
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 ideal for showing the contribution of each product category to total sales because it visually represents parts of a whole, making it easy to compare proportions at a glance. The stacked bar chart also effectively shows category contributions within a total, allowing for both absolute and relative comparisons across different time periods or segments. Both chart types directly address the need to visualize proportional breakdowns of a single aggregate metric.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Scatter plot
Why it's wrong here
Scatter plots show correlation, not part-to-whole relationships.
- ✗
Histogram
Why it's wrong here
Histograms show frequency distribution of a single variable.
- ✓
Pie chart
Why this is correct
Pie charts effectively show each category's proportion of the total.
- ✗
Line chart
Why it's wrong here
Line charts show trends over time, not contributions to a total.
- ✓
Stacked bar chart
Why this is correct
Stacked bar charts can show the composition of each category relative to the whole.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.