AZ-400 Configure processes and communications Practice Question
This AZ-400 practice question tests your understanding of configure processes and communications. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
Refer to the exhibit. You are reviewing an Azure DevOps YAML pipeline. The pipeline is configured with a webhook trigger from GitHub for pull request opened events. However, the pipeline does not trigger when a PR is opened. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The webhook subscription is not configured in GitHub.
Option B is correct because the 'trigger' is set to 'none', which disables all triggers except the webhook? Actually, 'trigger: none' disables the CI trigger but does not affect resource triggers like webhooks? Wait, in Azure DevOps YAML, 'trigger: none' disables the CI trigger, but resource triggers (like webhooks) still work. However, the pipeline might not be set to use the correct webhook? Actually, the most likely cause is that the webhook is not properly configured in GitHub to send events to Azure DevOps. Option A (Incorrect filter) is possible but the filter looks correct. Option C (Missing agent pool) would cause a runtime error. Option D (Webhook name mismatch) would cause connection issue but the exhibit shows 'GitHubPR' as name.
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.
✓
The webhook subscription is not configured in GitHub.
Why this is correct
The YAML defines the webhook, but GitHub needs to be configured to send events to Azure DevOps.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The webhook name does not match the service connection.
Why it's wrong here
The name 'GitHubPR' is used; the connection is 'GitHubConnection', which is separate.
✗
The pipeline lacks an agent pool specification.
Why it's wrong here
Missing agent pool would cause a different error, not prevent triggering.
✗
The webhook filter is incorrect; 'opened' should be 'created'.
Why it's wrong here
'opened' is the correct action for PR opened events.
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 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.
Identify which AZ-400 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.
Configure processes and communications — This question tests Configure processes and communications — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The webhook subscription is not configured in GitHub. — Option B is correct because the 'trigger' is set to 'none', which disables all triggers except the webhook? Actually, 'trigger: none' disables the CI trigger but does not affect resource triggers like webhooks? Wait, in Azure DevOps YAML, 'trigger: none' disables the CI trigger, but resource triggers (like webhooks) still work. However, the pipeline might not be set to use the correct webhook? Actually, the most likely cause is that the webhook is not properly configured in GitHub to send events to Azure DevOps. Option A (Incorrect filter) is possible but the filter looks correct. Option C (Missing agent pool) would cause a runtime error. Option D (Webhook name mismatch) would cause connection issue but the exhibit shows 'GitHubPR' as name.
What should I do if I get this AZ-400 question wrong?
Identify which AZ-400 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: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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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