AZ-400 Practice Question: Design and implement build and release pipelines
This AZ-400 practice question tests your understanding of design and implement build and release pipelines. 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 build pipeline uses a Microsoft-hosted agent. The pipeline fails intermittently with 'Error: No space left on device'. What is the most effective solution?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Add a step to clean up temporary files before the build completes.
Option C is correct because the best approach is to reduce the build artifacts footprint by cleaning up unnecessary files before the build completes. Option A is wrong because using a self-hosted agent might not address the disk space issue if the same amount of data is produced. Option B is wrong because increasing the agent's disk space is not possible with Microsoft-hosted agents. Option D is wrong because parallel jobs do not affect disk space on a single agent.
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.
✗
Increase the agent's temporary storage by setting the TMP variable.
Why it's wrong here
Microsoft-hosted agents have fixed storage; you cannot increase it.
✗
Switch to a self-hosted agent with more disk space.
Why it's wrong here
Self-hosted agents can be configured with more space, but the root cause is the build generating too much data.
✓
Add a step to clean up temporary files before the build completes.
Why this is correct
Removing unnecessary files reduces disk usage and prevents space issues.
Related concept
Read the scenario before looking for a memorised answer.
✗
Configure the pipeline to use more parallel jobs.
Why it's wrong here
Parallel jobs use separate agents, each with their own disk space, but do not fix the space issue on a single agent.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
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.
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: Add a step to clean up temporary files before the build completes. — Option C is correct because the best approach is to reduce the build artifacts footprint by cleaning up unnecessary files before the build completes. Option A is wrong because using a self-hosted agent might not address the disk space issue if the same amount of data is produced. Option B is wrong because increasing the agent's disk space is not possible with Microsoft-hosted agents. Option D is wrong because parallel jobs do not affect disk space on a single agent.
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.
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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