DA0-002 Visualization and Reporting Practice Question
An analyst needs to display the number of website visitors per age group (e.g., 18-25, 26-35, 36-45). Which chart type is most appropriate?
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
✓
Histogram
A histogram displays the distribution of a continuous variable (age) across bins (age groups).
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Bar chart
Why it's wrong here
Bar charts are for categorical data, but age groups are continuous intervals.
- ✓
Histogram
Why this is correct
Histograms are designed for binned continuous data.
- ✗
Line chart
Why it's wrong here
Line charts show trends over time.
- ✗
Pie chart
Why it's wrong here
A pie chart encodes proportions of a whole using angular segments, but the stem requires comparing visitor counts across distinct, non-additive age groups (18–25, 26–35, 36–45) where the total is not a meaningful single entity. This chart type is tempting because it effectively shows part-to-whole relationships, such as market share of browsers, where each slice sums to 100% of a single category. However, here the age groups are independent categories, not parts of a unified total, so a bar chart (with a quantitative axis for count and a categorical axis for age bands) is required to display the discrete comparisons accurately.
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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.