AZ-400 Develop a security and compliance plan Practice Question
This AZ-400 practice question tests your understanding of develop a security and compliance plan. 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.
Your organization uses Azure DevOps with classic pipelines. Security audit requires that all pipeline variables containing secrets (e.g., API keys) are stored in Azure Key Vault and referenced dynamically. Currently, secrets are stored as plain text in the pipeline UI. You need to migrate to Key Vault with minimal downtime and ensure that secret values are never exposed in logs. What should you do?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "never"
Why it matters: Absolute qualifier. True only if the statement has zero exceptions — be cautious of options that seem obvious but break down in edge cases.
Why wrong: Secure files can be downloaded but may appear in logs.
B
Create a variable group linked to Key Vault, mark variables as 'secret', and reference them in pipelines. Update pipeline steps to use the variable group.
Key Vault integration masks secrets and keeps them out of logs.
C
Use the 'Azure Key Vault' task to download secrets as pipeline variables.
Why wrong: Task downloads secrets but may expose them in logs if not handled.
D
Add each secret as a pipeline variable with the 'secret' type.
Why wrong: Still stored in Azure DevOps, not Key Vault.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create a variable group linked to Key Vault, mark variables as 'secret', and reference them in pipelines. Update pipeline steps to use the variable group.
Option A is correct because linking Key Vault via library variable groups keeps secrets out of logs when 'Keep secret' is enabled. The 'secret' variable type in pipelines masks values. Option B is wrong because secret variables are still stored in Azure DevOps, not Key Vault. Option C is wrong because it doesn't address log exposure. Option D is wrong because it doesn't prevent exposure in logs.
Key principle: Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
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 secrets in a secure file in Azure DevOps.
Why it's wrong here
Secure files can be downloaded but may appear in logs.
✓
Create a variable group linked to Key Vault, mark variables as 'secret', and reference them in pipelines. Update pipeline steps to use the variable group.
Why this is correct
Key Vault integration masks secrets and keeps them out of logs.
Clue confirmation
The clue word "never" in the question point toward this answer.
Use the 'Azure Key Vault' task to download secrets as pipeline variables.
Why it's wrong here
Task downloads secrets but may expose them in logs if not handled.
✗
Add each secret as a pipeline variable with the 'secret' type.
Why it's wrong here
Still stored in Azure DevOps, not Key Vault.
Common exam traps
Common exam trap: usable hosts are not the same as total addresses
Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.
Detailed technical explanation
How to think about this question
Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.
KKey Concepts to Remember
CIDR notation defines the prefix length.
Block size helps identify subnet boundaries.
Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
The required host count determines the smallest suitable subnet.
TExam Day Tips
→Write the block size before choosing the subnet.
→Check whether the question asks for hosts, subnets or a specific address range.
→Do not confuse /24, /25, /26 and /27 host counts.
Key takeaway
Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Real-world example
How this comes up in practice
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-400 question in full detail.
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related AZ-400 subnetting questions on CIDR, address ranges, and subnet selection.
Develop a security and compliance plan — This question tests Develop a security and compliance plan — CIDR notation defines the prefix length..
What is the correct answer to this question?
The correct answer is: Create a variable group linked to Key Vault, mark variables as 'secret', and reference them in pipelines. Update pipeline steps to use the variable group. — Option A is correct because linking Key Vault via library variable groups keeps secrets out of logs when 'Keep secret' is enabled. The 'secret' variable type in pipelines masks values. Option B is wrong because secret variables are still stored in Azure DevOps, not Key Vault. Option C is wrong because it doesn't address log exposure. Option D is wrong because it doesn't prevent exposure in logs.
What should I do if I get this AZ-400 question wrong?
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related AZ-400 subnetting questions on CIDR, address ranges, and subnet selection.
Are there clue words in this question I should notice?
Yes — watch for: "never". Absolute qualifier. True only if the statement has zero exceptions — be cautious of options that seem obvious but break down in edge cases.
What is the key concept behind this question?
CIDR notation defines the prefix length.
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