This PL-300 practice question tests your understanding of prepare 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 are connecting Power BI to an Azure SQL Database. The database contains a table 'Orders' with 10 million rows. You need to minimize the data load time and ensure that only the most recent 30 days of data are imported. Which approach should you use?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "minimum / minimize"
Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use a Native Query that selects only the last 30 days of data.
Option D is correct because using a Native Query that selects only the last 30 days of data pushes the filtering logic to the Azure SQL Database, reducing the amount of data transferred over the network and imported into Power BI. This minimizes load time by avoiding the import of all 10 million rows, while still ensuring only the required 30-day window is brought into the data model.
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.
✗
Import the entire table and apply a date filter in Power Query Editor.
Why it's wrong here
All rows are still imported, causing high load time.
✗
Enable incremental refresh policy with a filter on the date column.
Why it's wrong here
Incremental refresh requires initial full load and is more complex; native query is simpler for a one-time import.
✗
Use DirectQuery mode and apply a date filter in the report.
Why it's wrong here
DirectQuery does not import data, but the requirement is to minimize load time for import mode.
✓
Use a Native Query that selects only the last 30 days of data.
Why this is correct
This pushes the filter to the source, reducing data volume.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse incremental refresh (Option B) with a one-time filter, not realizing that incremental refresh requires a pre-configured policy and is meant for ongoing refreshes, not for reducing initial import size.
Detailed technical explanation
How to think about this question
Using a Native Query with a WHERE clause on the date column (e.g., WHERE OrderDate >= DATEADD(day, -30, GETDATE())) leverages SQL Server's query optimizer to perform a seek or range scan on an index, minimizing I/O and network latency. Power BI's native query feature sends the SQL statement directly to the database, and only the filtered result set is returned, which is especially beneficial for large tables like 10 million rows where full table scans are costly.
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.
TExam Day Tips
→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 healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Prepare the data — This question tests Prepare the data — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use a Native Query that selects only the last 30 days of data. — Option D is correct because using a Native Query that selects only the last 30 days of data pushes the filtering logic to the Azure SQL Database, reducing the amount of data transferred over the network and imported into Power BI. This minimizes load time by avoiding the import of all 10 million rows, while still ensuring only the required 30-day window is brought into the data model.
What should I do if I get this PL-300 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
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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