This AZ-400 practice question tests your understanding of design and implement build and release pipelines. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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.
Network Topology
You ran the above Azure CLI command to check the deployment source of an Azure Web App. The web app is not deploying automatically when commits are pushed to the main branch. Based on the output, 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.
Network Topology
A
Deployment rollback is disabled, preventing automatic deployments.
Why wrong: Rollback is unrelated to automatic deployment.
B
The continuous deployment sync is not enabled; you need to enable it or configure a pipeline.
The output shows the source but not that CD is active; likely sync is off.
C
The branch is set to 'main' but commits are pushed to 'master'.
Why wrong: The branch is main, which matches.
D
The repo URL uses GitHub but Azure Web Apps only supports Azure Repos.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The continuous deployment sync is not enabled; you need to enable it or configure a pipeline.
The output shows that the web app is configured with a GitHub repository and branch 'main', but the 'continuous deployment sync' is not enabled. Without this setting, Azure Web Apps will not automatically pull new commits from the repository. You must either enable continuous deployment in the portal or configure a CI/CD pipeline (e.g., Azure DevOps or GitHub Actions) to trigger deployments on push.
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.
✗
Deployment rollback is disabled, preventing automatic deployments.
Why it's wrong here
Rollback is unrelated to automatic deployment.
✓
The continuous deployment sync is not enabled; you need to enable it or configure a pipeline.
Why this is correct
The output shows the source but not that CD is active; likely sync is off.
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 branch is set to 'main' but commits are pushed to 'master'.
Why it's wrong here
The branch is main, which matches.
✗
The repo URL uses GitHub but Azure Web Apps only supports Azure Repos.
Why it's wrong here
Azure Web Apps supports GitHub.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may assume the branch mismatch (C) is the issue, but the output confirms the branch is correct, so the real problem is the missing continuous deployment sync setting, which is a common oversight when configuring GitHub deployments in Azure.
Detailed technical explanation
How to think about this question
The 'continuous deployment sync' setting in Azure Web Apps uses a webhook registered in the GitHub repository to notify Azure of new commits. When disabled, the webhook is either not created or not active, so Azure never receives push events. Enabling it automatically configures the webhook and sets up a sync trigger that pulls the latest code from the specified branch. This is distinct from a full CI/CD pipeline, which can include build steps, testing, and staging slots.
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 build and release pipelines — This question tests Design and implement build and release pipelines — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The continuous deployment sync is not enabled; you need to enable it or configure a pipeline. — The output shows that the web app is configured with a GitHub repository and branch 'main', but the 'continuous deployment sync' is not enabled. Without this setting, Azure Web Apps will not automatically pull new commits from the repository. You must either enable continuous deployment in the portal or configure a CI/CD pipeline (e.g., Azure DevOps or GitHub Actions) to trigger deployments on push.
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.
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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