AZ-400 NuGet restore from multiple feeds Practice Question
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.
You are designing a build pipeline for a .NET Core application. You need to ensure that the pipeline restores NuGet packages from both an Azure Artifacts feed and the public NuGet gallery. The pipeline must fail if a package is not found in either source. Which two actions must you take? (Select two.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create a NuGet.config file that includes both feeds as package sources and reference it in the restore task.
Option A is correct because a NuGet.config file explicitly defines the package sources (both the Azure Artifacts feed and the public NuGet gallery) that the restore task will query. By referencing this file in the restore task, the pipeline ensures it searches both sources. Option D is correct because setting the 'CheckConsistency' flag to true in the restore task enforces that the restore operation fails if any package cannot be resolved from the configured sources, meeting the requirement to fail on missing packages.
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.
✗
Set the 'NoWarn' property to NU1603 to ignore warnings about missing packages.
Why it's wrong here
This would suppress warnings, not cause failure on missing packages.
✗
Use the 'dotnet restore' task with the '--no-cache' flag.
Why it's wrong here
This bypasses cache but does not enforce failure on missing packages.
✗
Configure the Azure Artifacts feed to use the public NuGet gallery as an upstream source.
Why it's wrong here
This is a feed configuration, not a pipeline setting, and does not cause failure if a package is missing.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The AZ-400 exam frequently reuses these exact scenarios with slightly different constraints.
✓Create a NuGet.config file that includes both feeds as package sources and reference it in the restore task.Correct answer▾✗Set the 'NoWarn' property to NU1603 to ignore warnings about missing packages.Wrong answer — click to see why▾
Why this is wrong here
This would suppress warnings, not cause failure on missing packages.
✗Use the 'dotnet restore' task with the '--no-cache' flag.Wrong answer — click to see why▾
Why this is wrong here
This bypasses cache but does not enforce failure on missing packages.
✗Configure the Azure Artifacts feed to use the public NuGet gallery as an upstream source.Wrong answer — click to see why▾
Why this is wrong here
This is a feed configuration, not a pipeline setting, and does not cause failure if a package is missing.
Analysis generated from the official AZ-400blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse upstream sources (which provide automatic fallback) with explicit source configuration and error handling, leading them to select Option E instead of understanding that upstream sources prevent failures rather than enforce them.
Detailed technical explanation
How to think about this question
Under the hood, the NuGet restore process uses the 'packageSources' section in NuGet.config to enumerate sources in order; if 'CheckConsistency' is enabled, the restore task validates that all packages listed in the project file are present in at least one of those sources, and if not, it throws an error. In real-world scenarios, this is critical for CI/CD pipelines where you want to catch missing dependencies early, especially when using a mix of private feeds and public galleries, as it prevents silent fallback or incomplete builds.
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: Create a NuGet.config file that includes both feeds as package sources and reference it in the restore task. — Option A is correct because a NuGet.config file explicitly defines the package sources (both the Azure Artifacts feed and the public NuGet gallery) that the restore task will query. By referencing this file in the restore task, the pipeline ensures it searches both sources. Option D is correct because setting the 'CheckConsistency' flag to true in the restore task enforces that the restore operation fails if any package cannot be resolved from the configured sources, meeting the requirement to fail on missing packages.
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.
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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