- A
Box plot
Why wrong: Box plots show quartiles and outliers but not the full distribution shape as clearly as a histogram.
- B
Line chart
Why wrong: Line charts show trends over time.
- C
Histogram
Histograms show the distribution of a continuous variable by binning data.
- D
Pie chart
Why wrong: Pie charts show categorical proportions.
Question 205 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.
Which chart type is best for displaying the distribution of a continuous variable, such as the age distribution of customers?
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 groups continuous data (like age) into bins along the x-axis and displays the frequency of observations within each bin as bars, making the distribution shape immediately visible. This directly addresses the need to show how customer ages are spread across the range, which is the definition of a distribution for a continuous variable.
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.
- ✗
Box plot
Why it's wrong here
Box plots show quartiles and outliers but not the full distribution shape as clearly as a histogram.
- ✗
Line chart
Why it's wrong here
Line charts show trends over time.
- ✓
Histogram
Why this is correct
Histograms show the distribution of a continuous variable by binning data.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Pie chart
Why it's wrong here
Pie charts show categorical proportions.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the distinction between a histogram and a bar chart, where candidates mistakenly choose a bar chart (not listed here) or a box plot because they confuse 'distribution' with 'summary statistics' or 'categorical comparison'.
Trap categories for this question
Command / output trap
Box plots show quartiles and outliers but not the full distribution shape as clearly as a histogram.
Detailed technical explanation
How to think about this question
Under the hood, a histogram works by dividing the range of the continuous variable into equal-width intervals (bins) and counting the number of data points falling into each bin; the choice of bin width can dramatically affect the perceived shape, a concept known as the 'bin width sensitivity' or 'Sturges' rule' for optimal bin count. In real-world data analysis, histograms are often used in exploratory data analysis (EDA) to detect skewness, multimodality, or gaps in customer age data before applying statistical models.
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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Visualising Data — study guide chapter
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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: Histogram — A histogram is the correct choice because it groups continuous data (like age) into bins along the x-axis and displays the frequency of observations within each bin as bars, making the distribution shape immediately visible. This directly addresses the need to show how customer ages are spread across the range, which is the definition of a distribution for a continuous variable.
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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