DA0-002 Visualization and Reporting Practice Question
Which TWO chart types are best suited for visualizing the distribution of a single continuous variable? (Select two.)
⚠ Common exam trap
DA0-002 often tests the confusion between charts for distribution (histogram, box plot) and charts for relationships (scatter plot) or trends (line chart), so candidates must match the chart type to the analytical purpose.
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
✓
Box plot
A box plot (B) is correct because it summarizes the distribution of a single continuous variable using the median, quartiles, and potential outliers, making spread and skewness directly visible. A histogram (D) is correct because it bins a single continuous variable into intervals and displays frequencies, revealing the shape, center, and spread of the distribution. A scatter plot (A) is not appropriate here because it requires two continuous variables to show their relationship. A line chart (C) is used to show trends over an ordered sequence, typically time, not the distribution of one variable. A pie chart (E) displays proportions of a whole for categorical data, not the distribution of a continuous 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.
- ✗
Scatter plot
Why it's wrong here
A scatter plot displays the relationship between two continuous variables, plotting paired values on two axes, so it shows correlation rather than the distribution of a single variable. It is tempting because it visualises continuous data, which is correct when the requirement is examining association between two variables.
- ✓
Box plot
Why this is correct
A box plot summarises a continuous variable's distribution through its median, quartiles and whiskers, directly satisfying the stem's requirement to show distribution of one continuous variable. It also exposes skewness and outliers, which histograms alone can obscure, making it a valid selection alongside the histogram.
- ✗
Line chart
Why it's wrong here
A line chart plots values against a sequence, typically time, showing trend rather than frequency distribution. It is tempting because it displays a continuous variable's values, which is correct when the requirement is showing change over time rather than the shape, spread, or concentration of one variable's distribution.
- ✓
Histogram
Why this is correct
A histogram bins a continuous variable's values and plots frequency per bin, directly revealing shape, modality, spread and skew. It is the canonical chart for visualising the distribution of a single continuous variable, as the stem asks.
- ✗
Pie chart
Why it's wrong here
Pie charts encode parts of a whole, so they require categorical segments summing to 100%, not a continuous variable's frequency distribution. They are tempting because they display proportions clearly, and would suit showing a categorical breakdown such as market share by region.
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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.