AZ-400 · topic practice

Design and implement a source control strategy practice questions

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Read each scenario carefully and choose your answer before revealing the explanation. Then check why your choice was right or wrong. Repeat until the reasoning feels automatic.

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Practise Microsoft Azure DevOps Engineer Expert AZ-400 Design and implement a source control strategy practice questions — original exam-style scenarios with answer choices, explanations, and analysis of common mistakes.

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20 questionsDomain: Design and implement a source control strategy

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What the exam tests

What to know about Design and implement a source control strategy

Design and implement a source control strategy questions test whether you can apply the concept in context, not just recognise a definition.

How the topic appears in realistic exam-style scenarios.

Which detail in the question changes the correct answer.

How to eliminate plausible but wrong options.

How to connect the question back to the wider exam objective.

Watch out for

Common Design and implement a source control strategy exam traps

▸Answering from memory before reading the full scenario.
▸Missing a constraint such as cost, availability, security, scope or command context.
▸Choosing a broad answer when the question asks for the most specific fix.
▸Ignoring why the wrong options are tempting.

Practice set

Design and implement a source control strategy questions

20 questions · select your answer, then reveal the explanation

Question 1mediummultiple choice

Read the full Design and implement a source control strategy explanation →

Your team uses a monorepo in Azure Repos with multiple feature branches. You notice that merge conflicts frequently occur because developers are working on the same files. You want to reduce conflicts and improve collaboration. Which branching strategy should you recommend?

Trap 1: Use release branches for each deployment and cherry-pick commits…

Release branches do not address frequent merge conflicts.

Trap 2: Use a single main branch and require all changes to be committed…

Direct commits to main are risky and can cause conflicts.

Trap 3: Use GitFlow with separate develop and release branches.

Long-lived branches increase merge conflicts.

Study all Design and implement a source control strategy common traps →

A
Use release branches for each deployment and cherry-pick commits from main.
Why wrong: Release branches do not address frequent merge conflicts.
B
Use trunk-based development with feature flags to merge small, frequent changes.
Short-lived branches and feature flags reduce conflicts.
C
Use a single main branch and require all changes to be committed directly.
Why wrong: Direct commits to main are risky and can cause conflicts.
D
Use GitFlow with separate develop and release branches.
Why wrong: Long-lived branches increase merge conflicts.

Design and implement a source control strategy practice questions

What to know about Design and implement a source control strategy

Common Design and implement a source control strategy exam traps

Design and implement a source control strategy questions

Your team uses a monorepo in Azure Repos with multiple feature branches. You notice that merge conflicts frequently occur because developers are working on the same files. You want to reduce conflicts and improve collaboration. Which branching strategy should you recommend?

Your company is migrating from TFVC to Git in Azure Repos. The repository contains a large number of binary files (e.g., .dll, .exe) that are frequently updated. You need to minimize repository size and clone time. What should you include in your migration plan?

You have a GitHub repository with a GitHub Actions workflow that builds a .NET application. The workflow should only run when changes are pushed to the main branch, but it currently runs on every push to any branch. How should you fix the workflow trigger?

You are reviewing a webhook payload from Azure Repos. The payload indicates that a new branch named 'feature-123' was created. Which event type triggered this webhook?

Exhibit

You see the above git log output. The team has a policy requiring linear history on the main branch. Which command should be used next time to integrate the feature branch?

Your team uses GitHub and wants to enforce that all commits to the main branch are signed with a GPG key. Which branch protection rule should you configure?

Your Azure DevOps project contains a Git repository with multiple branches. You need to ensure that code reviews are mandatory for all pull requests targeting the 'release' branch. Additionally, the build pipeline must pass before merging. How should you configure branch policies?

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?

You are setting up a new GitHub repository for a project that requires strict access control. Only specific team members should be able to push to the main branch, but all team members should be able to create branches and open pull requests. What is the best way to achieve this?

Which TWO actions help reduce the size of a Git repository over time?

Which THREE are best practices for managing secrets in GitHub Actions workflows?

Which TWO are valid reasons to use a monorepo?

You receive a webhook notification from Azure Pipelines with the above payload. The build for the 'feature/logging' branch failed. You want to automatically create a work item to track the fix. What should you configure in Azure DevOps?

Exhibit

You have the above branch policy configuration for the main branch. A developer pushes a new commit to an existing pull request. What happens?

Your team uses GitHub and wants to automate the creation of a new release branch (e.g., release/v1.2.3) whenever a tag starting with 'v' is pushed. Which GitHub Actions trigger should you use?

Your team uses Git for source control. A developer accidentally committed a large binary file (500 MB) to the main branch. The push succeeded but other team members are now complaining about slow fetch times. What is the most efficient way to remove the file from the repository history?

Your organization is adopting a trunk-based development strategy with short-lived feature branches. Which branch policy should you enforce to ensure that code is integrated frequently and conflicts are minimized?

Your team uses GitHub and wants to enforce a policy that all commits to the main branch must be signed with a GPG key that is associated with the author's GitHub account. Which method should you use to enforce this?

Your organization uses Azure Repos and has multiple Git repositories that share common code. You want to enable code reuse across these repositories without duplicating code. Which strategy should you use?

Your team uses GitHub Flow and wants to ensure that every pull request is reviewed by at least one team member. Which branch protection rule should you enable?

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