The correct answer is to configure the dataset to use a service principal with a credential stored in Power BI. This approach hides SQL credentials from workspace viewers because the service principal acts as a dedicated identity for authentication, and the stored credential is never exposed to end users—only the service principal’s token is used for the DirectQuery connection to Azure SQL Database. On the Microsoft Power BI Data Analyst PL-300 exam, this scenario tests your understanding of secure data source authentication, often appearing as a trap where candidates confuse Row-Level Security (RLS) or Object-Level Security (OLS) with credential hiding; RLS controls row access but does not obscure connection details, while OLS governs metadata visibility. A common memory tip is to think of the service principal as a “masked proxy”—it takes the authentication hit so users never see the underlying SQL credentials.
PL-300 Manage and secure Power BI Practice Question
This PL-300 practice question tests your understanding of manage and secure power bi. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
Your Power BI workspace contains a dataset that uses a DirectQuery connection to Azure SQL Database. You need to ensure that only users with the 'Viewer' role in the workspace can query the dataset, but they should not be able to see the underlying SQL credentials. What should you do?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure the dataset to use a service principal with a credential stored in Power BI.
Option A is correct because using a service principal with a credential stored in Power BI ensures users do not see credentials. Option B is wrong because stored credentials are not visible to users. Option C is wrong because RLS does not hide credentials. Option D is wrong because OLS does not apply to credentials.
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.
✗
Use Windows authentication with the user's own credentials.
Why it's wrong here
Users would need direct SQL access.
✗
Use row-level security (RLS) to restrict query access.
Why it's wrong here
RLS does not hide credentials.
✓
Configure the dataset to use a service principal with a credential stored in Power BI.
Why this is correct
Service principal credentials are not exposed to users.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use object-level security (OLS) to hide the credential columns.
Why it's wrong here
OLS hides columns, not credentials.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 PL-300 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Manage and secure Power BI — This question tests Manage and secure Power BI — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Configure the dataset to use a service principal with a credential stored in Power BI. — Option A is correct because using a service principal with a credential stored in Power BI ensures users do not see credentials. Option B is wrong because stored credentials are not visible to users. Option C is wrong because RLS does not hide credentials. Option D is wrong because OLS does not apply to credentials.
What should I do if I get this PL-300 question wrong?
Identify which PL-300 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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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