The answer is to use the Azure CLI action with a user-assigned managed identity for the GitHub runner. This is correct because managed identities eliminate the need to store credentials in secrets or variables, providing a more secure authentication method for deploying schema changes to Azure SQL Database. The managed identity is assigned to the GitHub runner, allowing it to authenticate directly to Azure without exposing a service principal secret, while still adhering to the principle of minimal permissions. On the DP-300 exam, this scenario tests your understanding of secure CI/CD integration, often contrasting managed identities against SQL authentication or service principal secrets—a common trap is choosing a secret-based method for its simplicity, but the exam emphasizes security best practices. Remember the mnemonic "MIMIC" for secure deployments: Managed Identity, Minimal permissions, Integrated CI/CD.
DP-300 Configure and manage automation of tasks Practice Question
This DP-300 practice question tests your understanding of configure and manage automation of tasks. 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 GitHub Actions for CI/CD. You need to automatically deploy schema changes to an Azure SQL Database after a pull request merge. The solution must use a service principal with minimal permissions. Which authentication method should the workflow use?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Azure CLI action using a user-assigned managed identity for the GitHub runner.
Option B is correct because Azure CLI with az sql db deploy action and managed identity integrates securely with GitHub Actions. Option A is wrong because SQL authentication requires credentials in secrets, which is less secure. Option C is wrong because connection strings in variables are not recommended. Option D is wrong because service principal with secret is acceptable but managed identity is more secure.
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.
✗
Service principal with a client secret stored in GitHub Secrets.
Why it's wrong here
While possible, managed identity is preferred for minimal permissions and no secret management.
✓
Azure CLI action using a user-assigned managed identity for the GitHub runner.
Why this is correct
Managed identities eliminate credential management and are securely tied to Azure resources.
Related concept
Read the scenario before looking for a memorised answer.
✗
Environment variables containing the connection string.
Why it's wrong here
Connection strings in variables are not secure and may be exposed.
✗
SQL authentication using a user name and password stored in GitHub Secrets.
Why it's wrong here
SQL authentication is less secure and passwords must be managed.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this DP-300 question in full detail.
Identify which DP-300 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Configure and manage automation of tasks — This question tests Configure and manage automation of tasks — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Azure CLI action using a user-assigned managed identity for the GitHub runner. — Option B is correct because Azure CLI with az sql db deploy action and managed identity integrates securely with GitHub Actions. Option A is wrong because SQL authentication requires credentials in secrets, which is less secure. Option C is wrong because connection strings in variables are not recommended. Option D is wrong because service principal with secret is acceptable but managed identity is more secure.
What should I do if I get this DP-300 question wrong?
Identify which DP-300 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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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