- A
Store the connection string in Azure Key Vault and use a managed identity to access it from the Function app.
Key Vault with managed identity provides secure storage, rotation, and no secrets in code.
- B
Store the connection string in a JSON configuration file and use Azure Policy to enforce encryption.
Why wrong: Configuration files in source code violate the policy.
- C
Store the connection string in Azure App Configuration with encryption at rest using a customer-managed key.
Why wrong: App Configuration does not natively support automatic rotation and still requires managing the key.
- D
Store the connection string as an environment variable in the Function app's application settings.
Why wrong: Environment variables are accessible via portal and require manual rotation.
Quick Answer
The correct choice is to store the connection string in Azure Key Vault and use a managed identity to access it from the Function app. This solution works because Azure Key Vault provides a centralized, secure vault for secrets, while a managed identity eliminates the need to store, manage, or rotate any credentials in code or configuration files—the Function app authenticates directly to Key Vault without any hardcoded keys. On the Microsoft Azure Developer Associate AZ-204 exam, this scenario tests your understanding of how to combine Key Vault’s built-in secret rotation capabilities with Azure-managed identities to meet strict security policies with minimal operational overhead. A common trap is choosing App Configuration with encryption, which lacks automatic rotation and still requires manual key management. Remember the memory tip: “Managed identity + Key Vault = zero-touch rotation.”
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. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 designing a solution to securely store connection strings for an Azure Function app that connects to Azure Service Bus. The connection string contains a Shared Access Key. The company policy requires that secrets be rotated every 90 days and that no secret is stored in source code or configuration files. The solution should minimize operational overhead. What should you use?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"minimum / minimize"Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Store the connection string in Azure Key Vault and use a managed identity to access it from the Function app.
Azure Key Vault with managed identity allows secure storage and automatic rotation of secrets without managing credentials in code. Option A is correct because it uses managed identity to access Key Vault, and Key Vault can handle rotation. Option B is incorrect because App Configuration with encryption still requires managing the encryption key and does not provide built-in rotation. Option C is incorrect because Environment variables in the Function app's app settings can be accessed by anyone with access to the portal, and rotation requires manual updates. Option D is incorrect because configuration files are explicitly against policy.
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 connection string in Azure Key Vault and use a managed identity to access it from the Function app.
Why this is correct
Key Vault with managed identity provides secure storage, rotation, and no secrets in code.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Store the connection string in a JSON configuration file and use Azure Policy to enforce encryption.
Why it's wrong here
Configuration files in source code violate the policy.
- ✗
Store the connection string in Azure App Configuration with encryption at rest using a customer-managed key.
Why it's wrong here
App Configuration does not natively support automatic rotation and still requires managing the key.
- ✗
Store the connection string as an environment variable in the Function app's application settings.
Why it's wrong here
Environment variables are accessible via portal and require manual rotation.
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 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 — study guide chapter
Learn the concepts, then practise the questions
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Connect to and consume Azure services and third-party services practice questions
Targeted practice on this topic area only
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All AZ-204 questions
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Microsoft Azure Developer Associate AZ-204 study guide
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AZ-204 practice test guide
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FAQ
Questions learners often ask
What does this AZ-204 question test?
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 connection string in Azure Key Vault and use a managed identity to access it from the Function app. — Azure Key Vault with managed identity allows secure storage and automatic rotation of secrets without managing credentials in code. Option A is correct because it uses managed identity to access Key Vault, and Key Vault can handle rotation. Option B is incorrect because App Configuration with encryption still requires managing the encryption key and does not provide built-in rotation. Option C is incorrect because Environment variables in the Function app's app settings can be accessed by anyone with access to the portal, and rotation requires manual updates. Option D is incorrect because configuration files are explicitly against policy.
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.
Are there clue words in this question I should notice?
Yes — watch for: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
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 →
Same concept, more angles
1 more ways this is tested on AZ-204
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. You need to deploy a web app that uses Azure SQL Database. The connection string must be securely stored and automatically rotated without application downtime. What should you use?
easy- A.Store the connection string as an environment variable in the App Service.
- B.Store the connection string in a web.config file with encrypted configuration.
- C.Store the connection string in Azure App Configuration and use a managed identity.
- ✓ D.Store the connection string in Azure Key Vault and configure automatic rotation.
Why D: Azure Key Vault supports automatic rotation of secrets (e.g., SQL connection strings) via integration with Azure SQL. Option A is correct. Option B is incorrect because App Configuration does not natively rotate secrets. Option C is incorrect because environment variables do not support rotation. Option D is incorrect because connection strings in web.config are not rotated automatically.
Last reviewed: Jun 20, 2026
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.
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