The answer is to enable the 'Reduce queries sent to the source' option in the report settings. This setting improves performance by combining multiple filter interactions into a single DAX query, thereby reducing the number of round trips to the Azure Analysis Services source when users filter by a date range. On the Microsoft Power BI Data Analyst PL-300 exam, this scenario tests your understanding of live connection optimization without altering the underlying model—a common trap is to suggest importing the data or using field parameters, which either break the live connection or do nothing for query load. Remember that Query Reduction is a report-level setting that applies filters collectively, not per visual. A useful memory tip: think of it as "batch your filters" to avoid flooding the source with separate requests.
PL-300 Visualize and analyze the data Practice Question
This PL-300 practice question tests your understanding of visualize and analyze the data. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
You have a Power BI report that uses a live connection to an Azure Analysis Services tabular model. Users report that the report loads slowly when filtering by a specific date range. You need to improve performance without changing the data source. What should you do?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable the 'Reduce queries sent to the source' option in the report settings.
Option C is correct because enabling Query Reduction reduces the number of DAX queries sent to the source by combining filters and applying them in a single query. Option A is wrong because field parameters do not affect performance. Option B is wrong because it requires changing the data source to import mode. Option D is wrong because visual-level filters do not reduce query load from the source.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Change the storage mode to Import for the fact table.
Why it's wrong here
Changing storage mode to Import would require a different data source configuration.
✗
Apply a visual-level filter to limit the date range.
Why it's wrong here
Visual-level filters do not reduce the number of queries sent to the source.
✗
Create a field parameter to allow users to select measures.
Why it's wrong here
Field parameters affect measure selection, not query performance.
✓
Enable the 'Reduce queries sent to the source' option in the report settings.
Why this is correct
This option reduces the number of DAX queries sent to the source by combining filters.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Identify which PL-300 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Visualize and analyze the data — This question tests Visualize and analyze the data — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable the 'Reduce queries sent to the source' option in the report settings. — Option C is correct because enabling Query Reduction reduces the number of DAX queries sent to the source by combining filters and applying them in a single query. Option A is wrong because field parameters do not affect performance. Option B is wrong because it requires changing the data source to import mode. Option D is wrong because visual-level filters do not reduce query load from the source.
What should I do if I get this PL-300 question wrong?
Identify which PL-300 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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