The answer is to enable 'Reduce cardinality by using aggregation' in the dataset settings. This improves DirectQuery performance by instructing Power BI to pre-aggregate data at the source, reducing the volume of rows sent across the network for each query without altering the underlying data model structure. On the PL-300 exam, this scenario tests your understanding of performance optimization techniques that work within DirectQuery’s constraints—specifically, that aggregation can lower latency while preserving the live connection to Azure SQL Database. A common trap is mistaking this for switching to Import mode, which changes the data model approach entirely, or for adjusting connection limits, which only helps concurrency. Remember the mnemonic: “Aggregate, don’t migrate” to recall that aggregation settings improve speed without changing the model’s storage mode.
PL-300 Manage and secure Power BI Practice Question
This PL-300 practice question tests your understanding of manage and secure power bi. 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.
A Power BI report uses a DirectQuery dataset connected to an Azure SQL Database. Users report that the report takes over 30 seconds to load. You need to improve performance without changing the data model. What should you recommend?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable 'Reduce cardinality by using aggregation' in the dataset settings.
Option B is correct. Enabling 'Reduce cardinality by using aggregation' can improve DirectQuery performance by pre-aggregating data. Option A is wrong because Import mode changes the data model approach. Option C is wrong because disabling 'Cross-report data binding' affects report interactivity but not query performance. Option D is wrong because increasing the max connections per user might help concurrency but not single query latency.
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.
✗
Increase the 'Maximum connections per user' setting in the Premium capacity.
Why it's wrong here
This improves concurrency, not individual query latency.
✓
Enable 'Reduce cardinality by using aggregation' in the dataset settings.
Why this is correct
Aggregations can improve DirectQuery performance.
Related concept
Read the scenario before looking for a memorised answer.
✗
Convert the dataset to Import mode.
Why it's wrong here
Changing to Import mode alters the data model and may not be desired.
✗
Disable 'Cross-report data binding' in the report settings.
Why it's wrong here
This feature affects report interactivity, not query performance.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
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.
Manage and secure Power BI — This question tests Manage and secure Power BI — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable 'Reduce cardinality by using aggregation' in the dataset settings. — Option B is correct. Enabling 'Reduce cardinality by using aggregation' can improve DirectQuery performance by pre-aggregating data. Option A is wrong because Import mode changes the data model approach. Option C is wrong because disabling 'Cross-report data binding' affects report interactivity but not query performance. Option D is wrong because increasing the max connections per user might help concurrency but not single query latency.
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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. You have a Power BI dataset that uses a DirectQuery connection to Azure Synapse Analytics. Users report that the report is slow. You need to improve query performance without changing the data source. What should you do?
hard
A.Reduce the cardinality of calculated measures.
B.Disable row-level security (RLS) on the dataset.
C.Increase the scheduled refresh frequency.
✓ D.Reduce the number of visuals on each report page.
Why D: Option C is correct because reducing the number of visuals on a page reduces the number of queries sent to the data source. Option A is incorrect because increasing scheduled refresh does not affect DirectQuery. Option B is incorrect because disabling RLS would not improve performance significantly. Option D is incorrect because reducing the cardinality of measures does not reduce the number of queries.
Last reviewed: Jun 21, 2026
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This PL-300 practice question is part of Courseiva's free Microsoft 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 PL-300 exam.
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