DA0-002 Visualization and Reporting Practice Question
A data analyst must build a one-page dashboard for a hospital's bed-management team. The team needs to know, at a glance, how many beds are free right now, how that compares with the same hour yesterday, and whether the trend is worsening. Which combination of visual elements is MOST appropriate for the top band of this dashboard?
⚠ Common exam trap
The trap here is assuming a visually rich chart such as a pie or map is automatically better for a dashboard, when the requirement is a fast, precise status read that only a KPI-plus-comparison-plus-sparkline band delivers.
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
✓
A single large number (KPI card) for current free beds, a smaller comparison value for yesterday, and a sparkline showing the last 24 hours.
The request is for a glanceable status band answering three linked questions: current value, comparison to a prior equivalent period, and direction. A KPI card paired with a comparison figure and a sparkline delivers exactly that combination with minimal reading effort. Composition, correlation, row-level detail, and spatial views all answer different questions and would slow the team's decision.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
A single large number (KPI card) for current free beds, a smaller comparison value for yesterday, and a sparkline showing the last 24 hours.
Why this is correct
A KPI card gives the instantaneous value the team acts on, the comparison value supplies the like-for-like benchmark against the same hour yesterday, and a sparkline encodes the recent direction of travel without consuming much space. Together they answer the three questions the team asked in one compact band.
- ✗
A pie chart of free beds by ward, a stacked bar of occupied versus free beds, and a scatter plot of admissions against discharges.
Why it's wrong here
These charts describe composition and correlation, not the current count, its prior-period benchmark, or its trajectory. A pie chart of wards cannot answer how many beds are free hospital-wide right now, and a scatter plot of admissions versus discharges adds analytical depth the team did not request on a glance-level dashboard band.
- ✗
A detailed table listing every bed, its ward, and its last-cleaned timestamp, sorted by ward name.
Why it's wrong here
A row-level table forces the viewer to scan and count to derive the total, which defeats the at-a-glance requirement. It provides audit detail rather than an aggregate, offers no prior-period comparison, and no trend, so none of the three questions can be answered without manual work. This belongs in a drill-through page, not the top band.
- ✗
A geographic map of the hospital campus with color-coded buildings and a legend explaining each ward's capacity.
Why it's wrong here
A map answers spatial questions such as where beds are located, which was not asked. It cannot show a precise current free-bed count, does not compare against the same hour yesterday, and encodes no time trend. Maps also consume substantial dashboard area relative to the single number the team needs.
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Last reviewed September 2026 · checked against the official CompTIA exam blueprint
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