DA0-002 Visualization and Reporting Practice Question
A company uses a dashboard to monitor server uptime. The data is collected every minute, but the dashboard only refreshes every hour. Users see gaps in the line chart. What is the most likely cause, and how should it be fixed?
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
✓
Increase the dashboard refresh rate to match data collection frequency
The gaps occur because the dashboard aggregates data over one-hour intervals, while data is collected every minute. When the dashboard refreshes, it only shows the latest one-hour snapshot, so data between refreshes is missing. Increasing the dashboard refresh rate to match data collection frequency ensures continuous display. Interpolation (option A) would artificially fill gaps, masking the issue rather than fixing it; the correct solution is to align refresh rates.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The line chart should interpolate missing data points
Why it's wrong here
Interpolation assumes continuity, but the data is not missing; it's just not fetched. It could create false data.
- ✗
Switch to a bar chart to avoid gaps
Why it's wrong here
Bar chart will also show gaps if data is not loaded for those intervals.
- ✓
Increase the dashboard refresh rate to match data collection frequency
Why this is correct
Refreshing every minute eliminates gaps because data is fetched in near real-time.
- ✗
Use a different data series with the same refresh rate
Why it's wrong here
All series are affected; changing series does not solve the refresh mismatch.
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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.