AZ-400 Practice Question: Design and implement a source control strategy
This AZ-400 practice question tests your understanding of design and implement a source control strategy. 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 organization has multiple GitHub repositories that use shared workflows. You want to centrally manage these workflows and ensure they are always up to date. What is the recommended approach?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "always"
Why it matters: Absolute qualifier. An answer using 'always' is only correct if there are genuinely no exceptions — absolute statements are often wrong in networking.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create a central repository with reusable workflows and reference them using the 'uses' keyword in your workflows.
Option B is correct because GitHub Actions allows you to reference workflows from other repositories using the 'uses' keyword with a path to a workflow file in another repo. Option A is wrong because submodules are for code, not workflows. Option C is wrong because you cannot directly reference a zip file. Option D is wrong because there is no 'workflow templates' API in GitHub.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Create a central repository with reusable workflows and reference them using the 'uses' keyword in your workflows.
Why this is correct
Reusable workflows are the official pattern.
Clue confirmation
The clue word "always" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
✗
Use the GitHub API to push workflow files to each repository on a schedule.
Why it's wrong here
Not a recommended approach; hard to maintain.
✗
Download the workflows from a central blob storage and include them as inline scripts.
Why it's wrong here
Not a supported pattern for workflow reuse.
✗
Store the workflows in a separate repository and use Git submodules to include them.
Why it's wrong here
Submodules are for code, not workflow files.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related AZ-400 NAT questions on configuration and troubleshooting.
Design and implement a source control strategy — This question tests Design and implement a source control strategy — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Create a central repository with reusable workflows and reference them using the 'uses' keyword in your workflows. — Option B is correct because GitHub Actions allows you to reference workflows from other repositories using the 'uses' keyword with a path to a workflow file in another repo. Option A is wrong because submodules are for code, not workflows. Option C is wrong because you cannot directly reference a zip file. Option D is wrong because there is no 'workflow templates' API in GitHub.
What should I do if I get this AZ-400 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related AZ-400 NAT questions on configuration and troubleshooting.
Are there clue words in this question I should notice?
Yes — watch for: "always". Absolute qualifier. An answer using 'always' is only correct if there are genuinely no exceptions — absolute statements are often wrong in networking.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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