PL-900 Demonstrate the capabilities of Power Pages Practice Question
This PL-900 practice question tests your understanding of demonstrate the capabilities of power pages. 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
{"text":"Refer to the exhibit.\n\n{\n \"$schema\": \"https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#\",\n \"contentVersion\": \"1.0.0.0\",\n \"parameters\": {\n \"websiteName\": {\n \"type\": \"string\",\n \"defaultValue\": \"contosoportal\"\n }\n },\n \"resources\": [\n {\n \"type\": \"Microsoft.Web/sites/config\",\n \"apiVersion\": \"2022-09-01\",\n \"name\": \"[concat(parameters('websiteName'), '/appsettings')]\",\n \"properties\": {\n \"PortalEndpoint\": \"https://contosoportal.powerappsportals.com\",\n \"AuthenticationEnabled\": \"true\",\n \"AllowedExternalDomains\": \"contoso.com\"\n }\n }\n ]\n}","description":"An ARM template snippet for configuring Power Pages app settings."}
Refer to the exhibit. You are reviewing an ARM template for deploying a Power Pages site. The template sets the 'AllowedExternalDomains' to 'contoso.com'. What is the purpose of this setting?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Restrict authentication to users from contoso.com.
Option B is correct. The 'AllowedExternalDomains' setting restricts which external domains can be used for authentication, so only users from contoso.com can sign in. Option A is wrong because it does not allow any domain. Option C is wrong because it's not about content embedding. Option D is wrong because it's not about API calls.
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.
✓
Restrict authentication to users from contoso.com.
Why this is correct
Only users from the specified domain can authenticate.
Related concept
Read the scenario before looking for a memorised answer.
✗
Allow users from any external domain to sign in.
Why it's wrong here
The setting restricts to contoso.com only.
✗
Enable cross-origin resource sharing (CORS) for contoso.com.
Why it's wrong here
CORS is configured separately.
✗
Allow embedding of content from contoso.com.
Why it's wrong here
This setting is for authentication, not embedding.
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 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 PL-900 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.
Demonstrate the capabilities of Power Pages — This question tests Demonstrate the capabilities of Power Pages — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Restrict authentication to users from contoso.com. — Option B is correct. The 'AllowedExternalDomains' setting restricts which external domains can be used for authentication, so only users from contoso.com can sign in. Option A is wrong because it does not allow any domain. Option C is wrong because it's not about content embedding. Option D is wrong because it's not about API calls.
What should I do if I get this PL-900 question wrong?
Identify which PL-900 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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