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 Azure DevOps pipeline uses a YAML template to avoid duplication. The template defines common build steps. You need to override one of the steps in a specific pipeline without modifying the template. Which approach should you use?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use template parameters with a 'steps' object that can be injected, and use the 'replace' keyword in the pipeline to override the step.
Option D is correct because Azure DevOps YAML templates support parameterized steps objects, allowing a pipeline to inject a custom set of steps that replace the default ones defined in the template. The `replace` keyword is used within the template to designate a default steps object that can be overridden by the calling pipeline, enabling step-level customization without modifying the template file.
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.
✗
Use the 'overrides' keyword in the pipeline YAML to specify which steps to replace.
Why it's wrong here
'overrides' is not a valid keyword in Azure DevOps YAML.
✗
Create a copy of the template and modify the step directly.
Why it's wrong here
Duplicating templates reduces maintainability.
✗
Use a conditional 'if' statement in the template to skip steps based on a parameter.
Why it's wrong here
Conditionals can skip steps but do not allow overriding; they are evaluated at runtime.
✓
Use template parameters with a 'steps' object that can be injected, and use the 'replace' keyword in the pipeline to override the step.
Why this is correct
Template parameters allow injecting custom steps, and 'replace' can override specific steps.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse the fictional `overrides` keyword (Option A) with a real feature, or incorrectly assume that conditional logic in the template (Option C) is the only way to control step execution, when in fact Azure DevOps provides a dedicated parameter injection pattern for step replacement.
Trap categories for this question
Keyword trap
'overrides' is not a valid keyword in Azure DevOps YAML.
Detailed technical explanation
How to think about this question
Under the hood, Azure DevOps YAML templates use the `steps` parameter with a default value defined in the template (e.g., `parameters: - name: steps - type: stepList - default: [steps: ...]`). The calling pipeline passes a new `steps` object using the `replace` keyword (e.g., `template: myTemplate.yml parameters: steps: [steps: ...]`), which completely substitutes the default steps list. This mechanism relies on YAML object merging and parameter injection, not on runtime conditionals, ensuring the template remains unchanged and reusable across multiple pipelines.
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 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.
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: Use template parameters with a 'steps' object that can be injected, and use the 'replace' keyword in the pipeline to override the step. — Option D is correct because Azure DevOps YAML templates support parameterized steps objects, allowing a pipeline to inject a custom set of steps that replace the default ones defined in the template. The `replace` keyword is used within the template to designate a default steps object that can be overridden by the calling pipeline, enabling step-level customization without modifying the template file.
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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