The answer is storing the API key in Azure Key Vault and retrieving it using Managed Identity, or using environment variables in Azure Function App settings. Both approaches ensure the API key is never hardcoded in the function code, with Key Vault providing centralized, encrypted secret management and Managed Identity eliminating the need for credentials in code or configuration. On the AZ-204 exam, this tests your understanding of secure configuration and identity-based access patterns for Azure Functions, often appearing in scenario-based questions where you must choose runtime-safe storage over CI/CD or code-level solutions. A common trap is confusing GitHub Secrets (which are for build pipelines, not runtime) with Azure App Settings, or thinking HTTP headers with a hardcoded key are secure. Memory tip: think “Key Vault + Managed Identity = no secrets in code,” and remember that App Settings are the simple, exam-friendly alternative when Key Vault isn’t required.
AZ-204 Practice Question: Connect to and consume Azure services and third-party services
This AZ-204 practice question tests your understanding of connect to and consume azure services and third-party services. 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.
Which TWO approaches can you use to call an external REST API from an Azure Function while ensuring the API key is not exposed in the function code?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Store the API key as an environment variable in the function app settings.
B and D are correct. Storing the API key in Key Vault and using Managed Identity to access it ensures the key is not in code. Using environment variables in App Service (function app settings) also keeps the key out of code. Option A is wrong because hardcoding is direct exposure. Option C is wrong because storing in GitHub Secrets is for CI/CD, not runtime. Option E is wrong because using HTTP headers with a hardcoded key still exposes it.
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 API key in GitHub repository secrets.
Why it's wrong here
For CI/CD, not runtime.
✗
Hardcode the API key in the function code.
Why it's wrong here
Exposes the key in code.
✓
Store the API key as an environment variable in the function app settings.
Why this is correct
Keeps key out of code.
Related concept
Read the scenario before looking for a memorised answer.
✗
Pass the API key in an HTTP header and include it in the source code.
Why it's wrong here
Still exposes key in source.
✓
Store the API key in Azure Key Vault and retrieve it using Managed Identity.
Why this is correct
Secure and no code exposure.
Related concept
Read the scenario before looking for a memorised answer.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-204 question in full detail.
Identify which AZ-204 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.
Connect to and consume Azure services and third-party services — This question tests Connect to and consume Azure services and third-party services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Store the API key as an environment variable in the function app settings. — B and D are correct. Storing the API key in Key Vault and using Managed Identity to access it ensures the key is not in code. Using environment variables in App Service (function app settings) also keeps the key out of code. Option A is wrong because hardcoding is direct exposure. Option C is wrong because storing in GitHub Secrets is for CI/CD, not runtime. Option E is wrong because using HTTP headers with a hardcoded key still exposes it.
What should I do if I get this AZ-204 question wrong?
Identify which AZ-204 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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This AZ-204 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the AZ-204 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.