Question 840 of 966

Prepare the data →easyMultiple ChoiceObjective-mapped

Quick Answer

The answer is that the data source requires a gateway to be configured for refresh. Even though the dataset resides in a Premium capacity workspace, the Power BI service cannot directly connect to data sources that are on-premises or within a private network, such as an on-premises SQL Server or Oracle database. Without an on-premises data gateway installed and properly configured, the scheduled refresh will consistently fail because the cloud service lacks network access to the local data source. On the Microsoft Power BI Data Analyst PL-300 exam, this scenario tests your understanding that Premium capacity does not eliminate the need for a gateway when the data source is not cloud-native; a common trap is assuming Premium automatically handles all connectivity. Remember the key distinction: Premium boosts performance and capacity, not network access. Memory tip: "Premium for power, gateway for reach"—if your data is behind a firewall, you still need the bridge.

PL-300 Prepare the data Practice Question

This PL-300 practice question tests your understanding of prepare the data. 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.

Exhibit

Refer to the exhibit.
```json
{
  "refreshSchedule": {
    "frequency": "Daily",
    "time": "05:00",
    "timeZone": "UTC",
    "notifyOption": "OnFailure",
    "notifyEmail": "admin@contoso.com"
  }
}
```

Refer to the exhibit. You are configuring a scheduled refresh for a Power BI dataset. The exhibit shows the refresh schedule settings. The dataset is in a workspace in a Premium capacity. The scheduled refresh runs at 5:00 AM UTC daily. However, the refresh is failing consistently. What is the most likely cause?

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.

Question 1easymultiple choice

Full question →

Exhibit

Refer to the exhibit.
```json
{
  "refreshSchedule": {
    "frequency": "Daily",
    "time": "05:00",
    "timeZone": "UTC",
    "notifyOption": "OnFailure",
    "notifyEmail": "admin@contoso.com"
  }
}
```

A
The notify option should be set to 'OnFailureOrSuccess' to get alerts.
Why wrong: Notify option does not cause failure.
B
The data source requires a gateway to be configured for refresh.
On-premises data sources require a gateway for scheduled refresh, even in Premium.
C
The refresh time is outside the allowed window for Premium capacities.
Why wrong: Premium capacities support scheduled refresh at any time.
D
The dataset is in a Premium capacity, which does not support scheduled refresh.
Why wrong: Premium capacities support scheduled refresh.

Full breakdown with real-world context →

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

The data source requires a gateway to be configured for refresh.

The exhibit shows a scheduled refresh configured for a dataset in a Premium capacity workspace, but the refresh is failing consistently. The most likely cause is that the data source requires a gateway to be configured for refresh. Even in Premium capacities, if the data source is on-premises or within a private network (e.g., SQL Server, Oracle, or SharePoint on-premises), an on-premises data gateway must be installed and configured to enable the Power BI service to connect and refresh the data. Without a gateway, the scheduled refresh will fail because the cloud service cannot directly access the local data source.

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.

✗
The notify option should be set to 'OnFailureOrSuccess' to get alerts.
Why it's wrong here
Notify option does not cause failure.
✓
The data source requires a gateway to be configured for refresh.
Why this is correct
On-premises data sources require a gateway for scheduled refresh, even in Premium.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The refresh time is outside the allowed window for Premium capacities.
Why it's wrong here
Premium capacities support scheduled refresh at any time.
✗
The dataset is in a Premium capacity, which does not support scheduled refresh.
Why it's wrong here
Premium capacities support scheduled refresh.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates often assume Premium capacities automatically resolve connectivity issues or that scheduled refresh is not supported in Premium, when in reality the gateway requirement is independent of capacity tier and depends solely on the data source location.

Detailed technical explanation

How to think about this question

When a data source is on-premises (e.g., SQL Server, Oracle, or a file share), the Power BI service cannot directly connect to it because it resides behind a firewall or in a private network. The on-premises data gateway acts as a bridge, securely transmitting data from the on-premises source to the Power BI service. The gateway must be installed on a machine with network access to the data source, and the data source must be added as a gateway data source in the Power BI service. Without this configuration, any scheduled refresh attempt will fail with a 'Cannot connect to data source' error, even if the dataset is in a Premium capacity.

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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.

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.

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FAQ

Questions learners often ask

What does this PL-300 question test?

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: The data source requires a gateway to be configured for refresh. — The exhibit shows a scheduled refresh configured for a dataset in a Premium capacity workspace, but the refresh is failing consistently. The most likely cause is that the data source requires a gateway to be configured for refresh. Even in Premium capacities, if the data source is on-premises or within a private network (e.g., SQL Server, Oracle, or SharePoint on-premises), an on-premises data gateway must be installed and configured to enable the Power BI service to connect and refresh the data. Without a gateway, the scheduled refresh will fail because the cloud service cannot directly access the local data source.

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: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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Last reviewed: Jun 24, 2026

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