DA0-002 Visualization and Reporting Practice Question
A data analyst wants to visualize the number of website visitors by traffic source (e.g., organic, paid social, email) and also show the proportion of each source within the total. Which chart type is best?
⚠ Common exam trap
Watch out — candidates often choose a pie chart because it shows proportions, but fail to recognize that the question requires displaying both absolute visitor counts and proportions, which a pie chart cannot do for multiple categories or time periods.
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
✓
Stacked bar chart
A stacked bar chart is best because it allows the data analyst to display both the absolute number of visitors per traffic source and the proportional contribution of each source to the total across categories (e.g., time periods). Each bar represents the total visitors, and segments within the bar show the breakdown by source, making it easy to compare both individual source counts and their relative shares.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Stacked bar chart
Why this is correct
Stacked bar charts show both category totals and subcategory proportions.
- ✗
Histogram
Why it's wrong here
Histograms show distribution of continuous data.
- ✗
Pie chart
Why it's wrong here
Pie charts show proportions but not absolute values easily.
- ✗
Line chart
Why it's wrong here
Line charts are for trends, not categorical comparisons.
Go deeper
Related to this question
About these practice questions
One of 986 original DA0-002 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
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.