The answer is to select the table in Model view and configure the incremental refresh policy. This is correct because incremental refresh in Power BI Desktop requires you to define the policy on the table itself after creating the rangeStart and rangeEnd parameters in Power Query; the policy then automatically applies date filtering to ensure only the last 30 days of data are refreshed during each scheduled refresh, drastically reducing refresh time. On the PL-300 exam, this tests your understanding that incremental refresh is a model-level setting, not a Power Query filter or a service-side configuration—a common trap is thinking you can set it up solely in Power Query or in the Power BI Service. Remember the sequence: parameters first, then Model view, then policy. Memory tip: “Parameters in Query, policy in Model—refresh only what’s new, not the whole folder.”
PL-300 Prepare the data Practice Question
This PL-300 practice question tests your understanding of prepare the data. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 a data analyst at a retail company. You have a Power BI semantic model that imports sales data from an Azure SQL Database. The database uses a timestamp column to track transaction time. You need to reduce the data refresh time and ensure that only the last 30 days of data are refreshed during each scheduled refresh. You have already created the necessary parameters rangeStart and rangeEnd in Power Query. What should you do next to implement incremental refresh?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
In Power BI Desktop, on the model view, select the table and set the incremental refresh policy.
Option D is correct because incremental refresh policies are defined in Power BI Desktop on the model view, not in the service or by simply filtering in Power Query. After creating the rangeStart and rangeEnd parameters, you must select the table in the Model view, open the incremental refresh policy dialog, and configure the policy to filter data based on those parameters, ensuring only the last 30 days are refreshed.
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.
✗
In the Power BI service, go to the dataset settings and configure the scheduled refresh.
Why it's wrong here
Scheduled refresh does not apply incremental refresh; it just sets the frequency.
✗
In Power Query Editor, apply the rangeStart and rangeEnd filters to the data and then close and apply.
Why it's wrong here
Filtering in Power Query is not enough; incremental refresh policy must be set in the model.
✗
In the Power BI service, create a new refresh schedule and set the incremental refresh period.
Why it's wrong here
Incremental refresh is not configured in the schedule settings.
✓
In Power BI Desktop, on the model view, select the table and set the incremental refresh policy.
Why this is correct
Correct. Incremental refresh policy is set in the model view table properties.
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 confuse filtering in Power Query Editor with setting an incremental refresh policy, not realizing that only the latter creates the partitioned refresh behavior required to reduce data refresh time.
Detailed technical explanation
How to think about this question
Incremental refresh works by partitioning the table into ranges based on the datetime column, with the policy defined in Power BI Desktop using the rangeStart and rangeEnd parameters. During each refresh, only the partition covering the last 30 days (plus any detect data changes window) is queried from the source, significantly reducing refresh time and resource usage. This is especially critical for large fact tables in Azure SQL Database where full table scans would be 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 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 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: In Power BI Desktop, on the model view, select the table and set the incremental refresh policy. — Option D is correct because incremental refresh policies are defined in Power BI Desktop on the model view, not in the service or by simply filtering in Power Query. After creating the rangeStart and rangeEnd parameters, you must select the table in the Model view, open the incremental refresh policy dialog, and configure the policy to filter data based on those parameters, ensuring only the last 30 days are refreshed.
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.
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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