- A
Store the workflow in a shared repository and use environment secrets to share credentials.
Why wrong: Environment secrets do not enable workflow reuse.
- B
Create a reusable workflow in a central repository and reference it using 'uses: owner/repo/.github/workflows/workflow.yml@ref'.
Reusable workflows allow calling another workflow from a different repository.
- C
Create a composite action and reference it from each workflow.
Why wrong: Composite actions reuse steps, not entire workflows with triggers and jobs.
- D
Create a workflow template in the organization's .github repository.
Why wrong: Templates are used as starting points, not for live reuse.
Question 895 of 928
How to Create and Use Reusable Workflows in GitHub Actions
This AZ-400 practice question tests your understanding of design and implement build and release pipelines. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 GitHub Actions for CI/CD. You want to reuse a workflow across multiple repositories without duplicating code. Which approach should you use?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create a reusable workflow in a central repository and reference it using 'uses: owner/repo/.github/workflows/workflow.yml@ref'.
Option B is correct because GitHub Actions supports reusable workflows that allow you to define a workflow in a central repository and reference it from other repositories using the 'uses' syntax with the format 'owner/repo/.github/workflows/workflow.yml@ref'. This eliminates code duplication while maintaining a single source of truth for the workflow logic, and the referenced workflow can be triggered by events in the caller repository.
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.
- ✗
Store the workflow in a shared repository and use environment secrets to share credentials.
Why it's wrong here
Environment secrets do not enable workflow reuse.
- ✓
Create a reusable workflow in a central repository and reference it using 'uses: owner/repo/.github/workflows/workflow.yml@ref'.
Why this is correct
Reusable workflows allow calling another workflow from a different repository.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Create a composite action and reference it from each workflow.
Why it's wrong here
Composite actions reuse steps, not entire workflows with triggers and jobs.
- ✗
Create a workflow template in the organization's .github repository.
Why it's wrong here
Templates are used as starting points, not for live reuse.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse reusable workflows with composite actions or workflow templates, not realizing that reusable workflows are the only mechanism that allows a complete workflow (including triggers) to be referenced and executed across repositories without duplication.
Detailed technical explanation
How to think about this question
Reusable workflows in GitHub Actions are defined in a repository with a '.github/workflows' directory and are called using the 'uses' keyword with a specific ref (branch, tag, or commit SHA). The caller workflow can pass inputs and secrets to the reusable workflow, and the reusable workflow can define outputs that are consumed by the caller. Under the hood, GitHub Actions resolves the reference at runtime, fetching the workflow file from the specified repository and ref, ensuring that changes to the reusable workflow are automatically picked up by all callers when they use a moving ref like 'main'.
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.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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Design and implement build and release pipelines — study guide chapter
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FAQ
Questions learners often ask
What does this AZ-400 question test?
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 reusable workflow in a central repository and reference it using 'uses: owner/repo/.github/workflows/workflow.yml@ref'. — Option B is correct because GitHub Actions supports reusable workflows that allow you to define a workflow in a central repository and reference it from other repositories using the 'uses' syntax with the format 'owner/repo/.github/workflows/workflow.yml@ref'. This eliminates code duplication while maintaining a single source of truth for the workflow logic, and the referenced workflow can be triggered by events in the caller repository.
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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Last reviewed: Jul 4, 2026
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