The answer is B: the SQL Server data source requires an on-premises data gateway. This is correct because the exhibit shows a connection string to a SQL Server instance that is not hosted in Azure—it points to an on-premises server name without “database.windows.net”—and Power BI’s cloud-based scheduled refresh cannot reach on-premises data without a gateway installed and configured. On the PL-900 exam, this question tests your understanding of data gateway requirements for hybrid scenarios, a common trap where candidates assume all SQL sources are cloud-based. Remember that any data source behind a corporate firewall, including on-premises SQL Server, needs a gateway for scheduled refresh, while Azure SQL Database and SharePoint Online do not. A quick memory tip: if the server name lacks “.windows.net,” think “gateway needed.”
PL-900 Practice Question: Describe the business value of Microsoft Power Platform
This PL-900 practice question tests your understanding of describe the business value of microsoft power platform. 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.
Refer to the exhibit. A Power BI dashboard is configured with the shown data sources. The dashboard fails to refresh automatically. 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.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The SQL Server data source requires an on-premises data gateway
The Excel file is stored on SharePoint, but the refresh schedule will fail if the Excel file is not in a supported location or if the gateway is not configured. However, the most common issue is that the Excel file requires an on-premises data gateway if it's on-premises, but here it's on SharePoint. Actually, for cloud sources like SQL Azure and SharePoint, no gateway is needed. But the refresh could fail if the credentials are not stored. The exhibit shows no gateway configured. But the question asks for the most likely cause. Option A is correct because the dashboard uses two data sources but the refresh schedule is set to daily, which is fine. Option B is incorrect because SQL Server in Azure does not need a gateway. Option C is plausible but the exhibit does not show gateway requirement. Option D is incorrect because daily is a valid frequency. The most likely cause is that the Excel file is not in a supported location? Actually, SharePoint Excel files are supported. Perhaps the issue is that the refresh schedule time is set to 2:00 AM, but the system time zone may differ? That's less likely. I think the best answer is B: The SQL Server data source requires an on-premises data gateway. But wait, the SQL Server is in Azure (database.windows.net), so it's cloud-based, no gateway needed. So B is wrong. Option C: The Excel file is stored on SharePoint, which is supported. Option D: The refresh frequency is daily, which is fine. Actually, the most likely cause might be that the Excel file is in OneDrive/SharePoint and the credentials are not set. But the exhibit does not show credentials. However, among the options, the most plausible is that the SQL Server data source requires a gateway (even though it's in Azure, some organizations might have a gateway if they use hybrid). But for Azure SQL, no gateway is required. I'll reconsider: The exhibit shows two data sources. The refresh schedule is set daily. The problem might be that the Excel file path uses a SharePoint URL, but the Excel file might be in a SharePoint document library that requires authentication. However, the most typical issue is that the Excel file resides in a location that is not supported by cloud refresh (e.g., local drive). But the exhibit shows a SharePoint URL. Actually, Excel files in SharePoint are supported. I think the best answer is that the SQL Server data source requires an on-premises data gateway because the connection string shows a server named 'myserver.database.windows.net' which is clearly Azure SQL, so no gateway. Alternatively, maybe the server name is actually an on-premises server? The exhibit shows 'database.windows.net' which is Azure. So B is false. Let me choose C: The Excel file is stored in an unsupported location. But SharePoint is supported. Hmm. Perhaps the answer is D: The refresh frequency is set to daily, which is valid. I'm stuck. Let me think differently: The question is a diagnostic. The exhibit shows a configuration. The most common reason for refresh failure is that the data source credentials are not provided or expired. But the exhibit does not show credentials. Option C might be correct if the Excel file is not on SharePoint but the path looks like SharePoint. Actually, the path includes 'sharepoint.com', so it is SharePoint. That is supported. Option A: The dashboard uses two data sources, but that is not a cause of failure. Option B: As argued, no gateway needed. Option D: Daily is fine. So maybe the answer is B because the SQL Server might be on-premises? But the server name includes database.windows.net. That's Azure. Wait, maybe the exhibit is meant to represent an on-premises SQL Server? The server name could be a custom domain? No. I need to adjust the exhibit to make it realistic. Let me change the exhibit to have an on-premises SQL Server. In the JSON, I'll change the connection string to 'Server=MyOnPremSQL;Database=SalesDB;...' without azure. That would make B correct. I'll modify the exhibit accordingly. The user said the exhibit must be REAL Microsoft Power Platform syntax. I'll use a JSON for a Power BI dataset. I'll change the SQL Server to be on-premises.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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 refresh frequency is set to daily, which is too infrequent
Why it's wrong here
Daily refresh is a valid frequency.
✗
The Excel file is stored in an unsupported location
Why it's wrong here
SharePoint is a supported location for Excel files.
✓
The SQL Server data source requires an on-premises data gateway
Why this is correct
The SQL Server is on-premises (no azure in server name), so a gateway is needed for cloud refresh.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
✗
The dashboard uses two data sources, but only one is allowed
Why it's wrong here
Power BI dashboards can have multiple data sources.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related PL-900 NAT questions on configuration and troubleshooting.
Describe the business value of Microsoft Power Platform — This question tests Describe the business value of Microsoft Power Platform — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: The SQL Server data source requires an on-premises data gateway — The Excel file is stored on SharePoint, but the refresh schedule will fail if the Excel file is not in a supported location or if the gateway is not configured. However, the most common issue is that the Excel file requires an on-premises data gateway if it's on-premises, but here it's on SharePoint. Actually, for cloud sources like SQL Azure and SharePoint, no gateway is needed. But the refresh could fail if the credentials are not stored. The exhibit shows no gateway configured. But the question asks for the most likely cause. Option A is correct because the dashboard uses two data sources but the refresh schedule is set to daily, which is fine. Option B is incorrect because SQL Server in Azure does not need a gateway. Option C is plausible but the exhibit does not show gateway requirement. Option D is incorrect because daily is a valid frequency. The most likely cause is that the Excel file is not in a supported location? Actually, SharePoint Excel files are supported. Perhaps the issue is that the refresh schedule time is set to 2:00 AM, but the system time zone may differ? That's less likely. I think the best answer is B: The SQL Server data source requires an on-premises data gateway. But wait, the SQL Server is in Azure (database.windows.net), so it's cloud-based, no gateway needed. So B is wrong. Option C: The Excel file is stored on SharePoint, which is supported. Option D: The refresh frequency is daily, which is fine. Actually, the most likely cause might be that the Excel file is in OneDrive/SharePoint and the credentials are not set. But the exhibit does not show credentials. However, among the options, the most plausible is that the SQL Server data source requires a gateway (even though it's in Azure, some organizations might have a gateway if they use hybrid). But for Azure SQL, no gateway is required. I'll reconsider: The exhibit shows two data sources. The refresh schedule is set daily. The problem might be that the Excel file path uses a SharePoint URL, but the Excel file might be in a SharePoint document library that requires authentication. However, the most typical issue is that the Excel file resides in a location that is not supported by cloud refresh (e.g., local drive). But the exhibit shows a SharePoint URL. Actually, Excel files in SharePoint are supported. I think the best answer is that the SQL Server data source requires an on-premises data gateway because the connection string shows a server named 'myserver.database.windows.net' which is clearly Azure SQL, so no gateway. Alternatively, maybe the server name is actually an on-premises server? The exhibit shows 'database.windows.net' which is Azure. So B is false. Let me choose C: The Excel file is stored in an unsupported location. But SharePoint is supported. Hmm. Perhaps the answer is D: The refresh frequency is set to daily, which is valid. I'm stuck. Let me think differently: The question is a diagnostic. The exhibit shows a configuration. The most common reason for refresh failure is that the data source credentials are not provided or expired. But the exhibit does not show credentials. Option C might be correct if the Excel file is not on SharePoint but the path looks like SharePoint. Actually, the path includes 'sharepoint.com', so it is SharePoint. That is supported. Option A: The dashboard uses two data sources, but that is not a cause of failure. Option B: As argued, no gateway needed. Option D: Daily is fine. So maybe the answer is B because the SQL Server might be on-premises? But the server name includes database.windows.net. That's Azure. Wait, maybe the exhibit is meant to represent an on-premises SQL Server? The server name could be a custom domain? No. I need to adjust the exhibit to make it realistic. Let me change the exhibit to have an on-premises SQL Server. In the JSON, I'll change the connection string to 'Server=MyOnPremSQL;Database=SalesDB;...' without azure. That would make B correct. I'll modify the exhibit accordingly. The user said the exhibit must be REAL Microsoft Power Platform syntax. I'll use a JSON for a Power BI dataset. I'll change the SQL Server to be on-premises.
What should I do if I get this PL-900 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related PL-900 NAT questions on configuration and troubleshooting.
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?
Static NAT maps one inside address to one outside address.
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