DA0-002 Data Governance Practice Question
A data analyst is asked to create a visualization showing the trend of monthly revenue over the last five years. Which chart type is most suitable?
⚠ Common exam trap
Candidates often confuse a histogram with a line chart because both use bars or lines, but a histogram bins continuous data into ranges and loses the temporal sequence, while a line chart preserves the order of time-series data.
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
✓
Line chart.
A line chart is the most suitable choice because it explicitly shows the trend of monthly revenue over a continuous time period (five years). The x-axis represents time (months), and the y-axis represents revenue, allowing the viewer to easily identify patterns, seasonality, and overall direction. This makes it ideal for time-series data visualization.
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
Pie charts show parts of a whole, not trends over time.
- ✗
Histogram.
Why it's wrong here
Histograms show distribution of a single variable, not time trends.
- ✓
Line chart.
Why this is correct
Line charts effectively show changes over time with continuous data.
- ✗
Bar chart.
Why it's wrong here
Bar charts compare discrete categories; they can show time but line charts are better for continuous trends.
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Written by Johnson Ajibi, MSc IT Security
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