The answer is to use Azure Key Vault to store the API key and reference it in the function. This is correct because Azure Key Vault provides a secure, centralized service for managing secrets, allowing your agent function to retrieve the API key at runtime via a managed identity or service principal without ever exposing the key in code, configuration files, or logs. On the Microsoft Azure AI Engineer Associate AI-102 exam, this scenario tests your understanding of secure secret management within agentic solutions, specifically how to avoid common pitfalls like hardcoding credentials or passing them through prompts, which would violate security best practices. A frequent trap is assuming environment variables are safe, but they can be leaked in debug output or logs. Remember the mnemonic: “Key Vault keeps keys covert” — always vault your secrets, never embed them.
AI-102 Implement an agentic solution Practice Question
This AI-102 practice question tests your understanding of implement an agentic solution. 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.
You are developing an agentic solution that uses Azure AI Agent Service with a custom function calling tool. The agent needs to call a function that requires authentication to an external API. How should you securely pass the API key to the function?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use Azure Key Vault to store the API key and reference it in the function
Using Azure Key Vault references in the function code is the secure way to retrieve secrets at runtime without exposing them. Hardcoding is insecure. Environment variables may be exposed. Passing in the prompt leaks 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.
✗
Hardcode the API key in the function code
Why it's wrong here
Hardcoding is a security risk and not recommended.
✓
Use Azure Key Vault to store the API key and reference it in the function
Why this is correct
Key Vault provides secure secret storage and retrieval.
Related concept
Read the scenario before looking for a memorised answer.
✗
Store the API key in an environment variable
Why it's wrong here
Environment variables can be exposed in logs or configurations.
✗
Pass the API key as part of the agent's system prompt
Why it's wrong here
Passing secrets in prompts is insecure and may be logged.
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 AI-102 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.
Implement an agentic solution — This question tests Implement an agentic solution — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use Azure Key Vault to store the API key and reference it in the function — Using Azure Key Vault references in the function code is the secure way to retrieve secrets at runtime without exposing them. Hardcoding is insecure. Environment variables may be exposed. Passing in the prompt leaks credentials.
What should I do if I get this AI-102 question wrong?
Identify which AI-102 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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