PL-300: Visualize & Analyze the Data
Visualize & Analyze the Data is one of the skill areas tested on the Power BI Data Analyst (PL-300) exam. Below are free PL-300 practice questions with worked answers and a concept diagram — each with a plain-language explanation. Practice the first 10 questions of PL-300 free, no signup.
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You have a Microsoft Power BI report whose PBIX file is 550 MB. It is consumed through an app workspace in shared capacity on powerbi.com. The report uses an imported dataset with a single fact table of 12 million rows, refreshed twice daily at 08:00 and 17:00. The report is one page holding 15 AppSource visuals and 10 default visuals. Users complain that the visuals are slow to load when they open and interact with the report. Which solution should you recommend to improve performance?
- Enable visual interactions.
- Rewrite the DAX measures to use iterator functions.
- ✓ Distribute the visuals across several pages.
- Swap the default visuals for AppSource visuals.
The single page holds 25 visuals (15 AppSource and 10 default), and each visual runs its own query on load, which is the performance bottleneck. Spreading the visuals over multiple pages lowers the number of concurrent queries per page, speeding up loading and interaction.
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