This DA0-001 practice question tests your understanding of communicating data insights. 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.
A business user asks a data analyst to include several charts in a weekly report. The user wants to see the trend of sales over the last 12 months at a glance. Which chart type should the analyst use?
Line chart
Line charts clearly show changes and trends over continuous time periods.
Stacked bar chart
Why wrong: Stacked bars can show trends but are less direct than line charts.
Treemap
Why wrong: Treemaps display hierarchical data, not temporal trends.
Pie chart
Why wrong: Pie charts are not suitable for time series trends.
Answer choices
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 correct choice because it is specifically designed to display trends over continuous time intervals, such as sales over 12 months. The x-axis represents time (months), and the y-axis represents sales values, allowing the user to quickly see upward, downward, or cyclical patterns. This aligns with the requirement to visualize a trend at a glance, which is a core strength of line charts in data visualization.
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.
Line chart
Why this is correct
Line charts clearly show changes and trends over continuous time periods.
Related concept
Read the scenario before looking for a memorised answer.
Stacked bar chart
Why it's wrong here
Stacked bars can show trends but are less direct than line charts.
Treemap
Why it's wrong here
Treemaps display hierarchical data, not temporal trends.
Pie chart
Why it's wrong here
Pie charts are not suitable for time series trends.
Common exam traps
The trap here is that candidates often confuse a stacked bar chart's ability to show cumulative totals over time with a clear trend line, but the stacked segments actually make it harder to discern the overall sales trajectory at a glance.
Trap categories for this question
Command / output trap
Stacked bars can show trends but are less direct than line charts.
Detailed technical explanation
Line charts connect individual data points with straight line segments, making them ideal for visualizing continuous data and detecting trends, seasonality, or anomalies. In practice, a data analyst might use a line chart with a moving average overlay to smooth out short-term fluctuations and highlight longer-term trends. This technique is particularly useful when the sales data contains weekly noise, as the moving average helps the business user focus on the underlying direction.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
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FAQ
Communicating Data Insights — This question tests Communicating Data Insights — Read the scenario before looking for a memorised answer..
The correct answer is: Line chart — A line chart is the correct choice because it is specifically designed to display trends over continuous time intervals, such as sales over 12 months. The x-axis represents time (months), and the y-axis represents sales values, allowing the user to quickly see upward, downward, or cyclical patterns. This aligns with the requirement to visualize a trend at a glance, which is a core strength of line charts in data visualization.
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.
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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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