The correct answer is to install and configure an on-premises data gateway, as this component is the only way to bridge the Power BI cloud service with a local SQL Server database for scheduled refreshes. The gateway securely transmits data from the on-premises source to the service, enabling automatic refresh within the required 30-minute window by handling authentication and query execution on the local network. On the PL-300 exam, this scenario tests your understanding of data connectivity architecture, often appearing as a distractor where candidates mistakenly choose DirectQuery or a cloud connector—remember that any on-premises source requiring scheduled refresh needs a gateway. A key memory tip is “no gateway, no refresh for on-prem,” since the cloud cannot reach your local database without this secure bridge.
PL-300 Deploy and maintain assets Practice Question
This PL-300 practice question tests your understanding of deploy and maintain assets. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 company publishes a Power BI dataset to the service. They need to ensure that when the underlying data source is updated, the dataset refreshes automatically within 30 minutes. The data source is an on-premises SQL Server database. Which component must be configured to enable this automatic refresh?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Install and configure an on-premises data gateway
To enable automatic refresh of a Power BI dataset from an on-premises SQL Server database, you must install and configure an on-premises data gateway. The gateway acts as a secure bridge, allowing the Power BI service to connect to on-premises data sources and execute scheduled refreshes. Without it, the cloud service cannot directly access the local database.
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.
✗
Publish the dataset with incremental refresh enabled
Why it's wrong here
Incremental refresh optimizes refresh performance but still requires a gateway for on-premises sources.
✗
Change the dataset storage mode to DirectQuery
Why it's wrong here
DirectQuery does not use scheduled refresh; it queries the source directly on each interaction.
✓
Install and configure an on-premises data gateway
Why this is correct
The gateway enables Power BI to connect to on-premises data sources for scheduled refresh.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable the XMLA endpoint for the workspace
Why it's wrong here
The XMLA endpoint allows programmatic management but does not automate refresh scheduling.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse incremental refresh or DirectQuery as alternatives to the gateway, not realizing that any on-premises data source—regardless of storage mode—requires a gateway for the Power BI service to access it.
Detailed technical explanation
How to think about this question
The on-premises data gateway uses a secure outbound connection from the gateway machine to Azure Service Bus, eliminating the need to open inbound firewall ports. For scheduled refresh, the Power BI service sends a refresh request to the gateway, which then executes the query against SQL Server and returns the results. In a real-world scenario, if the gateway is not installed or is misconfigured, the refresh will fail with a 'credentials required' or 'gateway not found' error, even if the dataset is correctly published.
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 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 exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Deploy and maintain assets — This question tests Deploy and maintain assets — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Install and configure an on-premises data gateway — To enable automatic refresh of a Power BI dataset from an on-premises SQL Server database, you must install and configure an on-premises data gateway. The gateway acts as a secure bridge, allowing the Power BI service to connect to on-premises data sources and execute scheduled refreshes. Without it, the cloud service cannot directly access the local database.
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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