- A
Stacked bar chart
Stacked bar charts show both category totals and subcategory proportions.
- B
Histogram
Why wrong: Histograms show distribution of continuous data.
- C
Pie chart
Why wrong: Pie charts show proportions but not absolute values easily.
- D
Line chart
Why wrong: Line charts are for trends, not categorical comparisons.
Question 14 of 1,000
DA0-001 Visualising Data Practice Question
This DA0-001 practice question tests your understanding of visualising data. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
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?
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.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
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.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that 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.
Trap categories for this question
Command / output trap
Histograms show distribution of continuous data.
Detailed technical explanation
How to think about this question
Stacked bar charts are ideal for part-to-whole relationships where each bar's total height represents the aggregate value (e.g., total visitors), and segments are color-coded by source. This visualization supports both absolute and relative comparisons simultaneously, unlike a pie chart which only shows proportions. In practice, data analysts often use stacked bar charts with normalized (100%) stacking to emphasize proportional changes when absolute totals vary significantly.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the DA0-001 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Questions learners often ask
What does this DA0-001 question test?
Visualising Data — This question tests Visualising Data — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: 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.
What should I do if I get this DA0-001 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
This DA0-001 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 DA0-001 exam.
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