The answer is a modified data source connection in the Power BI service. This is the most likely cause because when the connection string—such as the server name, database, or authentication method—is changed in the service settings without updating the underlying dataset, the report’s visual cannot retrieve data, triggering the “Couldn’t load the data for this visual” error. On the Microsoft Power Platform Fundamentals PL-900 exam, this scenario tests your understanding of how Power BI datasets and gateways interact; a common trap is assuming the gateway or credentials are at fault when the real issue is a mismatch between the service’s connection and the dataset’s reference. Remember the memory tip: “Service changes break the chain—update the dataset to load again.”
PL-900 Demonstrate capabilities of Power BI Practice Question
This PL-900 practice question tests your understanding of demonstrate capabilities of power bi. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
Error: "The data source for the report has been removed or changed. Please refresh the report to get the latest data."
A user sees the exhibit error when opening a Power BI report in the service. 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 data source connection in the service was modified
The error shown in the exhibit is a typical 'Couldn't load the data for this visual' message that occurs when the data source connection defined in the Power BI service has been changed (e.g., server name, database name, or authentication method) but the report's underlying dataset still references the old connection. This mismatch prevents the service from retrieving data, even if the gateway is online and credentials are valid. Option D is correct because modifying the data source connection in the service without updating the dataset's connection string breaks the data retrieval pipeline.
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 scheduled refresh failed due to credentials
Why it's wrong here
Credential failure would show a specific credential error.
✗
The on-premises data gateway is offline
Why it's wrong here
Gateway offline would show a gateway error, not this message.
✗
The dataset was deleted from the workspace
Why it's wrong here
If deleted, the report would not open at all.
✓
The data source connection in the service was modified
Why this is correct
This error indicates the dataset cannot find the data source.
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.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse a data source connection modification error with a gateway offline error, because both can prevent data loading, but the gateway error is specific to on-premises connectivity while the connection modification error occurs even with cloud data sources.
Trap categories for this question
Command / output trap
Credential failure would show a specific credential error.
Detailed technical explanation
How to think about this question
Under the hood, Power BI datasets store connection strings in the model's Data Source Definition (DSD) within the .pbix or .pbit file, and when the service connection is modified via the 'Edit credentials' or 'Change source' UI, the service updates its own metadata but does not automatically propagate that change back to the dataset's embedded connection. This is a common pitfall when using DirectQuery or live connections, where the service must resolve the data source at query time, and a mismatch between the service's stored connection and the dataset's connection causes a 'Data source error: The data source is not in the expected format' or similar error. In real-world scenarios, this often happens after a database migration or when switching from a test to a production server without re-importing the dataset.
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.
Demonstrate capabilities of Power BI — This question tests Demonstrate capabilities of Power BI — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The data source connection in the service was modified — The error shown in the exhibit is a typical 'Couldn't load the data for this visual' message that occurs when the data source connection defined in the Power BI service has been changed (e.g., server name, database name, or authentication method) but the report's underlying dataset still references the old connection. This mismatch prevents the service from retrieving data, even if the gateway is online and credentials are valid. Option D is correct because modifying the data source connection in the service without updating the dataset's connection string breaks the data retrieval pipeline.
What should I do if I get this PL-900 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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Question Discussion
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