The answer is Azure Key Vault because it is the dedicated Azure service for securely storing and managing secrets like database connection strings and passwords, and it integrates directly with ARM template deployments. During deployment, you can reference a Key Vault secret in your template’s parameter file or via a linked template, allowing Azure Resource Manager to retrieve the secret at runtime without ever exposing it in plaintext or storing it in source control. On the AZ-900 exam, this scenario tests your understanding of secure secret management and the principle of separation of concerns—never hardcode sensitive values. A common trap is choosing Azure App Configuration, which is for application settings, not secrets, or Azure SQL Database, which is a data store. Remember the mnemonic: “Key Vault keeps keys, secrets, and certs; ARM links to it, so your code never hurts.”
AZ-900 Describe Azure management and governance Practice Question
This AZ-900 practice question tests your understanding of describe azure management and governance. 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.
A company uses Azure Resource Manager templates to deploy infrastructure. They need to manage secrets such as database connection strings and passwords securely. Which Azure service should they use to store and retrieve these secrets during deployment?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
A) Azure Key Vault
Azure Key Vault is the correct service because it is designed specifically to securely store and manage secrets such as database connection strings, passwords, and certificates. During Azure Resource Manager (ARM) template deployments, you can reference Key Vault secrets directly in the template using a linked template or a parameter file, allowing the secrets to be retrieved at deployment time without exposing them in plaintext. This integration ensures that sensitive values are never hardcoded or stored in source control.
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.
✓
A) Azure Key Vault
Why this is correct
Key Vault provides secure storage for secrets and can be referenced in ARM templates to pass sensitive values at deployment time.
Related concept
Read the scenario before looking for a memorised answer.
✗
B) Azure Policy
Why it's wrong here
Policy enforces rules, not for managing secrets.
✗
C) Azure Managed Identity
Why it's wrong here
Managed Identity helps with authentication to Azure services, but not for storing or retrieving secrets during deployment.
✗
D) Azure Service Principal
Why it's wrong here
Service Principal is an identity for applications; it does not store secrets.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is confusing Azure Key Vault with Azure Managed Identity or Service Principal, as candidates often think that Managed Identity or Service Principals are used to store secrets, when in fact they are identities that require secrets to be stored elsewhere, typically in Key Vault.
Detailed technical explanation
How to think about this question
Under the hood, ARM templates integrate with Key Vault by referencing the vault and secret identifier (e.g., `[reference(resourceId('Microsoft.KeyVault/vaults/secrets', 'MyVault', 'MySecret')).secretValue]`) within a linked template or by using the `parameters` section with a `keyVaultReference` object. This approach ensures that secrets are never transmitted in the deployment request payload; instead, the ARM service retrieves the secret directly from Key Vault at deployment time. A real-world scenario is deploying a web app with a SQL database connection string stored in Key Vault, where the ARM template passes the secret as a secure string parameter, preventing exposure in deployment logs or version control.
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.
TExam Day Tips
→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-900 question in full detail.
Describe Azure management and governance — This question tests Describe Azure management and governance — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: A) Azure Key Vault — Azure Key Vault is the correct service because it is designed specifically to securely store and manage secrets such as database connection strings, passwords, and certificates. During Azure Resource Manager (ARM) template deployments, you can reference Key Vault secrets directly in the template using a linked template or a parameter file, allowing the secrets to be retrieved at deployment time without exposing them in plaintext. This integration ensures that sensitive values are never hardcoded or stored in source control.
What should I do if I get this AZ-900 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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