DA0-002 Visualization and Reporting Practice Question
A data analyst needs to visualize the distribution of customer ages in a dataset. The analyst wants to see the frequency of ages grouped into bins. Which chart type should be used?
⚠ Common exam trap
DA0-002 often tests the histogram-vs-bar-chart distinction — candidates pick bar chart because both use rectangular bars, missing that histograms bin continuous data while bar charts compare discrete categories.
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 is the correct choice because it is purpose-built for showing the frequency distribution of a continuous numeric variable by grouping values into bins (e.g., ages 18–25, 26–33). Each bar's height represents the count of observations falling into that bin, directly answering the analyst's need to see frequency by age group. Unlike a bar chart, the bars are adjacent with no gaps, reflecting the continuous nature of the underlying variable.
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 it's wrong here
A pie chart shows parts of a whole as proportional slices, so it cannot display frequency counts across age bins. It tempts for categorical breakdowns, but binned continuous data with many intervals needs a histogram, which is the correct choice here.
- ✓
Histogram
Why this is correct
A histogram bins a continuous numeric variable, such as customer age, into intervals and plots the frequency of observations per bin as adjacent bars. This directly satisfies the requirement to visualise distribution and frequency of ages grouped into bins.
- ✗
Box plot
Why it's wrong here
A box plot summarises a distribution through median, quartiles and outliers, not the frequency of observations within each bin. It tempts because it describes distribution shape, but the stem asks for counts per bin, which only a histogram displays.
- ✗
Bar chart
Why it's wrong here
A bar chart plots categorical frequencies with gaps between bars, not the continuous binned intervals a histogram requires. It tempts because it looks similar and does show counts, but the stem specifies grouped age bins, where adjacent bars representing a continuous range are needed.
Go deeper
Related to this question
About these practice questions
This DA0-002 question is part of Courseiva's 1,004-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
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.