Quick Answer
The answer is both a histogram and a box plot. These two chart types are the correct choices because they are specifically designed to reveal the shape, spread, and central tendency of a continuous distribution, whereas bar charts or pie charts are reserved for categorical data. A histogram groups continuous data into bins to show the frequency distribution, while a box plot summarizes the same distribution through its five-number summary—minimum, first quartile, median, third quartile, and maximum—making outliers immediately visible. On the CompTIA Data+ DA0-001 exam, this question tests your ability to distinguish between visualization types for continuous versus discrete variables; a common trap is selecting a bar chart, which is only for categorical counts. A helpful memory tip: think of the histogram as showing the “shape” of the data, and the box plot as showing the “spread” and outliers—together, they give you the full picture of any continuous distribution.
This DA0-001 practice question tests your understanding of visualizing data. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
Which TWO of the following chart types are appropriate for showing the distribution of a continuous variable? (Choose 2.)
Box plot
Shows distribution summary with quartiles and outliers.
Bar chart
Why wrong: Used for categorical comparisons, not continuous distribution.
Pie chart
Why wrong: Shows parts of a whole, not distribution.
Line chart
Why wrong: Usually for trends over time, not distribution of a single variable.
Histogram
Shows frequency distribution of continuous data.
Answer choices
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 is correct because it visually summarizes the distribution of a continuous variable through its five-number summary (minimum, first quartile, median, third quartile, maximum), clearly showing spread, central tendency, and potential outliers. This makes it ideal for distribution analysis in data visualization contexts like the DA0-001 exam.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Box plot
Why this is correct
Shows distribution summary with quartiles and outliers.
Related concept
Read the scenario before looking for a memorised answer.
Bar chart
Why it's wrong here
Used for categorical comparisons, not continuous distribution.
Pie chart
Why it's wrong here
Shows parts of a whole, not distribution.
Line chart
Why it's wrong here
Usually for trends over time, not distribution of a single variable.
Histogram
Why this is correct
Shows frequency distribution of continuous data.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
The trap here is that candidates often confuse bar charts with histograms, mistakenly thinking bar charts can show continuous distributions, but bar charts require categorical x-axis values and have gaps between bars, while histograms use continuous intervals with no gaps.
Trap categories for this question
Command / output trap
Shows parts of a whole, not distribution.
Detailed technical explanation
A histogram works by binning the continuous variable into contiguous, non-overlapping intervals (bins) and plotting the frequency or density of data points within each bin, effectively approximating the probability density function. In real-world data analysis, histograms are sensitive to bin width selection; too few bins can obscure distribution shape, while too many can introduce noise. Box plots complement histograms by providing a robust summary that is less sensitive to outliers and binning choices.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
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FAQ
Visualizing Data — This question tests Visualizing Data — Read the scenario before looking for a memorised answer..
The correct answer is: Box plot — A box plot is correct because it visually summarizes the distribution of a continuous variable through its five-number summary (minimum, first quartile, median, third quartile, maximum), clearly showing spread, central tendency, and potential outliers. This makes it ideal for distribution analysis in data visualization contexts like the DA0-001 exam.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
About these practice questions
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Same concept, more angles
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Which TWO chart types are best suited for visualizing the distribution of a single continuous variable? (Select two.)
mediumWhy B: Histogram shows frequency bins; box plot shows quartiles and outliers.
Last reviewed: Jun 24, 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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