The correct answer is to create a custom connector with API key authentication and use it in the app. This approach is correct because a custom connector acts as a secure wrapper around the REST API, allowing you to configure the API key in the connection settings rather than hardcoding it into the app’s logic. By defining the authentication type as “API Key” within the connector, the key is passed automatically in the header on every request, keeping it out of the app code and reducing exposure. On the PL-900 exam, this scenario tests your understanding of how to securely integrate external services—a common trap is choosing “HTTP with manual headers,” which would embed the key in the app and risk credential leakage. Remember the memory tip: “Connector locks the key, HTTP leaves it in the code.”
PL-900 Demonstrate the capabilities of Power Apps Practice Question
This PL-900 practice question tests your understanding of demonstrate the capabilities of power apps. 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.
A company uses Power Apps to create a canvas app for employee expense reporting. The app needs to integrate with the corporate HR system to fetch employee details such as manager email and cost center. The HR system exposes a REST API that requires an API key in the header. Which approach should the app maker use to securely connect to the HR system?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create a custom connector with API key authentication and use it in the app.
Option A is correct because a custom connector allows configuring authentication (e.g., API key) and can be used in the app. Option B is wrong because HTTP with manual headers exposes the API key in the app code. Option C is wrong because SharePoint is not a REST API for an external system. Option D is wrong because Power Automate still requires a secure connection method.
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.
✗
Store the HR data in a SharePoint list and connect the app to SharePoint.
Why it's wrong here
This requires manual synchronization and does not integrate directly with the REST API.
✗
Build a Power Automate flow that calls the API and returns data to the app.
Why it's wrong here
The flow still needs to authenticate; using a custom connector is the recommended approach.
✓
Create a custom connector with API key authentication and use it in the app.
Why this is correct
Custom connectors support various authentication types and securely store credentials.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use the HTTP action in Power Apps to call the API and include the API key in the headers as a static value.
Why it's wrong here
Hardcoding the API key in the app code is insecure.
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 startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
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 Apps — This question tests Demonstrate the capabilities of Power Apps — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Create a custom connector with API key authentication and use it in the app. — Option A is correct because a custom connector allows configuring authentication (e.g., API key) and can be used in the app. Option B is wrong because HTTP with manual headers exposes the API key in the app code. Option C is wrong because SharePoint is not a REST API for an external system. Option D is wrong because Power Automate still requires a secure connection method.
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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