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.
Your organization uses GitHub Enterprise and requires that all commits to the main branch are signed with a GPG key verified by your organization. Developers are getting errors when pushing signed commits. 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 developer's GPG key is not uploaded to their GitHub account or not verified.
Option B is correct because GitHub requires that the GPG key used to sign a commit be uploaded to the user's GitHub account and marked as verified. If the key is missing or unverified, GitHub cannot confirm the signature's authenticity, causing the push to be rejected when branch protection rules enforce signed commits.
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 branch protection rule requires a linear history.
Why it's wrong here
Linear history doesn't affect signing.
✓
The developer's GPG key is not uploaded to their GitHub account or not verified.
Why this is correct
The key must be uploaded and verified for GitHub to recognize the signature.
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 developer's email in the commit does not match any email on their GitHub account.
Why it's wrong here
While email must match, the signing failure is more likely due to missing GPG key.
✗
The developer's SSH key is not added to their GitHub account.
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse authentication (SSH keys) with signing (GPG keys) or assume email mismatch is the primary cause, when in fact the core issue is the absence or unverified status of the GPG key itself.
Detailed technical explanation
How to think about this question
GPG signing uses asymmetric cryptography: the developer signs the commit with their private key, and GitHub verifies the signature using the corresponding public key uploaded to the account. The key must be in a verified state (confirmed via a cryptographic challenge) for GitHub to display the 'Verified' badge; if the key is not uploaded or not verified, the push is blocked by branch protection rules that require signed commits. A subtle behavior is that GitHub caches key verification status, so a newly uploaded key may take a few minutes to become effective.
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.
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 developer's GPG key is not uploaded to their GitHub account or not verified. — Option B is correct because GitHub requires that the GPG key used to sign a commit be uploaded to the user's GitHub account and marked as verified. If the key is missing or unverified, GitHub cannot confirm the signature's authenticity, causing the push to be rejected when branch protection rules enforce signed commits.
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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Question Discussion
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