AZ-400 Design and implement a DevOps infrastructure Practice Question
This AZ-400 practice question tests your understanding of design and implement a devops infrastructure. 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.
A team wants to automatically destroy a temporary test environment after a pull request is merged or closed. What Azure DevOps feature should they use?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Environment with post-deployment approvals
Option A is correct because Azure DevOps Environments support post-deployment approvals and can be configured with a deployment job that automatically triggers resource cleanup when a pull request is merged or closed. By defining a 'destroy' job in the YAML pipeline that runs only on the 'post-deployment' trigger of an environment, the team can tear down the temporary test environment without manual intervention.
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.
✓
Environment with post-deployment approvals
Why this is correct
Post-deployment approvals can trigger a cleanup job when the environment is no longer needed.
Related concept
Read the scenario before looking for a memorised answer.
✗
Branch policy with required reviewers
Why it's wrong here
Branch policies control merging, not environment lifecycle.
✗
Pipeline trigger on branch deletion
Why it's wrong here
Branch deletion triggers don't automatically clean up environments.
✗
Service hook to Azure Functions
Why it's wrong here
Service hooks can trigger external processes but are not the built-in feature for environment cleanup.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse pipeline triggers on branch deletion (Option C) with environment lifecycle events, not realizing that branch deletion triggers do not inherently respond to pull request merge/close events and lack the built-in environment management capabilities of deployment jobs with post-deployment gates.
Detailed technical explanation
How to think about this question
Under the hood, Azure DevOps Environments use deployment jobs that can be gated by approvals and checks, including post-deployment gates that evaluate conditions like 'Pull request merged or closed'. The pipeline YAML can define a 'destroy' stage with a condition like `eq(variables['Build.Reason'], 'PullRequest')` and a deployment job targeting the environment, which automatically triggers cleanup when the PR is completed. In real-world scenarios, this pattern is often combined with infrastructure-as-code tools like Terraform or ARM templates to ensure consistent teardown, avoiding orphaned resources and cost overruns.
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 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. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. 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.
Design and implement a DevOps infrastructure — This question tests Design and implement a DevOps infrastructure — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Environment with post-deployment approvals — Option A is correct because Azure DevOps Environments support post-deployment approvals and can be configured with a deployment job that automatically triggers resource cleanup when a pull request is merged or closed. By defining a 'destroy' job in the YAML pipeline that runs only on the 'post-deployment' trigger of an environment, the team can tear down the temporary test environment without manual intervention.
What should I do if I get this AZ-400 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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Question Discussion
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