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. 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 a monorepo in Azure Repos with multiple microservices. Developers frequently report merge conflicts due to long-lived feature branches. Which branching strategy minimizes merge conflicts while supporting continuous integration?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use trunk-based development with short-lived feature branches and frequent merges to main
Trunk-based development with short-lived feature branches (typically lasting less than a day) minimizes merge conflicts by ensuring that changes are integrated into the main branch frequently, often multiple times per day. This approach reduces the divergence between branches, making conflicts less likely and easier to resolve. It also supports continuous integration by triggering automated builds and tests on every merge to main, aligning with the team's need for rapid feedback and reduced integration overhead.
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 release branches for all development work and merge to main only at release time
Why it's wrong here
Release branches are for stabilization, not daily development.
✗
Use GitFlow with separate develop and main branches, and long-lived feature branches
Why it's wrong here
GitFlow with long-lived feature branches increases merge conflicts.
✗
Use a forking workflow where each developer works in a personal fork and submits pull requests
Why it's wrong here
Forking is intended for external contributions, not internal team collaboration.
✓
Use trunk-based development with short-lived feature branches and frequent merges to main
Why this is correct
Trunk-based development minimizes conflicts by integrating small changes often.
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 often associate GitFlow (Option B) with structured branching and mistakenly believe it reduces conflicts, but in reality, its long-lived feature branches increase conflict frequency and hinder continuous integration, making trunk-based development (Option D) the correct choice for minimizing conflicts and supporting CI.
Detailed technical explanation
How to think about this question
In trunk-based development, the main branch is always in a deployable state, and developers merge small, incremental changes multiple times per day, often using feature toggles to hide incomplete work. This contrasts with GitFlow, where the develop branch can become a bottleneck, and long-lived feature branches can require complex rebasing or merging to stay current. Real-world adoption at scale (e.g., Google, Netflix) shows that trunk-based development reduces cycle time and integration pain, but requires disciplined use of short-lived branches and automated testing to prevent regressions.
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 a source control strategy — This question tests Design and implement a source control strategy — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use trunk-based development with short-lived feature branches and frequent merges to main — Trunk-based development with short-lived feature branches (typically lasting less than a day) minimizes merge conflicts by ensuring that changes are integrated into the main branch frequently, often multiple times per day. This approach reduces the divergence between branches, making conflicts less likely and easier to resolve. It also supports continuous integration by triggering automated builds and tests on every merge to main, aligning with the team's need for rapid feedback and reduced integration overhead.
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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