DA0-002 Visualization and Reporting Practice Question
An analyst has a dataset with monthly sales figures for the past five years. They want to highlight the cumulative effect of sales over time and show the total contribution of each month stacked on top of previous months. Which chart type is most suitable?
⚠ Common exam trap
Watch out — candidates often confuse a stacked bar chart with an area chart, thinking that stacking bars shows cumulative effect, but the area chart's continuous fill better represents the cumulative flow over time, which is the key requirement in the question.
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
✓
Area chart
An area chart is the most suitable choice because it fills the space between the line and the baseline with color, visually emphasizing the cumulative total over time. This allows the analyst to see both the trend of monthly sales and the stacked contribution of each month to the overall cumulative effect, which is exactly what the question requires.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Line chart
Why it's wrong here
A line chart shows individual trends but not cumulative totals unless stacked.
- ✗
Stacked bar chart
Why it's wrong here
Stacked bar chart is for comparing parts of a whole across categories, not for continuous time cumulative.
- ✓
Area chart
Why this is correct
Correct. An area chart, especially stacked, shows cumulative trends over time.
- ✗
Waterfall chart
Why it's wrong here
Waterfall charts show incremental changes but not cumulative continuous trends.
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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.