PL-300 Visualize and analyze the data Practice Question
This PL-300 practice question tests your understanding of visualize and analyze the data. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
Which TWO actions can improve the performance of a Power BI report that uses DirectQuery? (Select two.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Set up aggregations in the data source
Options B and C are correct because reducing the number of visuals reduces queries, and setting up aggregations reduces the data scanned. Option A is wrong because increasing cache size does not affect DirectQuery. Option D is wrong because using calculated columns moves computation to Power BI, but they are evaluated row by row and can be slow. Option E is wrong because using many small visuals increases queries.
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.
✓
Set up aggregations in the data source
Why this is correct
Aggregations can pre-summarize data, reducing query volume.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use calculated columns instead of measures
Why it's wrong here
Calculated columns are computed during refresh, which can be slow in DirectQuery.
✗
Add more slicers to allow users to filter data
Why it's wrong here
More slicers can increase query load.
✓
Reduce the number of visuals on the page
Why this is correct
Fewer visuals mean fewer queries to the source.
Related concept
Read the scenario before looking for a memorised answer.
✗
Increase the cache size in the Power BI service
Why it's wrong here
Cache settings apply to Import mode, not DirectQuery.
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.
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: Set up aggregations in the data source — Options B and C are correct because reducing the number of visuals reduces queries, and setting up aggregations reduces the data scanned. Option A is wrong because increasing cache size does not affect DirectQuery. Option D is wrong because using calculated columns moves computation to Power BI, but they are evaluated row by row and can be slow. Option E is wrong because using many small visuals increases queries.
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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