CompTIA Data+ (DA0-001) — All Questions
5 questions
An analyst wants to show the trend of monthly website visits over the past three years. Which chart type is most appropriate?
- a.A pie chart
- b.A line chart✓
- c.A single-value scorecard
- d.A word cloud
A line chart is ideal for showing how a value changes over a continuous time period, making trends and seasonality easy to read. A pie chart shows parts of a whole at one moment, a scorecard shows a single number, and a word cloud displays text frequency.
To examine the relationship between two continuous variables, such as advertising spend and revenue, which chart is most suitable?
- a.A pie chart
- b.A stacked bar of categories
- c.A single gauge
- d.A scatter plot✓
A scatter plot places each observation by its two continuous values, revealing correlation, clusters, and outliers between the variables. Pie charts, category bars, and gauges are not designed to show the relationship between two continuous measures.
An analyst wants to display the distribution of a single continuous variable by grouping values into ranges (bins) and showing how many fall in each. Which chart should be used?
- a.A histogram✓
- b.A pie chart
- c.A line chart of raw values
- d.A geographic map
A histogram groups a continuous variable into bins and shows the frequency in each, revealing the shape of the distribution such as skew or modality. A pie chart shows composition, a line chart shows trends, and a map shows geography, none of which display a distribution this way.
When designing an executive dashboard, which practice best supports clear communication?
- a.Use as many colors and 3-D effects as possible to look impressive
- b.Include every available metric on one crowded screen
- c.Highlight the key KPIs and choose chart types that match the data and message✓
- d.Remove all titles and axis labels to reduce clutter
Effective dashboards focus on the key performance indicators the audience needs and use chart types suited to the data and message, keeping the design clean and labeled. Excessive decoration, overcrowding, and removing labels all hinder understanding.
A regional sales manager wants to compare total sales across the 50 U.S. states at a glance, with color intensity showing higher versus lower values. Which visualization is most appropriate?
- a.A single line chart
- b.A choropleth (filled geographic map)✓
- c.A pie chart with 50 slices
- d.A one-row data table
A choropleth map shades geographic regions by value, making spatial patterns across states immediately visible. A pie chart with 50 slices would be unreadable, a single line chart shows trends over time, and a raw table does not convey spatial patterns at a glance.