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. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 team uses Azure Pipelines to build a .NET application. You notice that the build takes 15 minutes because of dependency restoration. You want to cache the NuGet packages to speed up subsequent builds. Which task should you add to your pipeline?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Cache task with a key based on the package lock file
Option A is correct because the 'Cache' task is used to cache dependencies including NuGet packages. Option B is wrong because 'NuGet restore' does not cache across builds. Option C is wrong because 'DownloadBuildArtifacts' is for downloading artifacts, not caching. Option D is wrong because 'DotNetCoreCLI' with 'restore' does not provide caching across builds.
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.
✗
DownloadBuildArtifacts task
Why it's wrong here
This downloads artifacts from a previous build, not for caching dependencies.
✗
NuGet restore task with the 'noCache' option set to false
Why it's wrong here
The 'noCache' option only controls local cache within a single build, not across builds.
✗
DotNetCoreCLI task with the 'restore' command
Why it's wrong here
This restores packages but does not cache them across builds.
✓
Cache task with a key based on the package lock file
Why this is correct
The Cache task can cache NuGet packages based on the lock file hash, speeding up subsequent restores.
Related concept
Read the scenario before looking for a memorised answer.
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.
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: Cache task with a key based on the package lock file — Option A is correct because the 'Cache' task is used to cache dependencies including NuGet packages. Option B is wrong because 'NuGet restore' does not cache across builds. Option C is wrong because 'DownloadBuildArtifacts' is for downloading artifacts, not caching. Option D is wrong because 'DotNetCoreCLI' with 'restore' does not provide caching across builds.
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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