The answer is user-assigned managed identity, along with system-assigned managed identity, as both enable an Azure App Service to connect to an Azure SQL Database without connection strings by leveraging Azure AD authentication. Instead of embedding credentials in code or config files, the app runtime obtains an automatically managed token from Azure AD, which is then used to authenticate to SQL Database—eliminating the security risk of exposed secrets. On the AZ-204 exam, this tests your understanding of identity-based access versus legacy credential storage, and a common trap is confusing managed identities with service principals or SQL authentication. Remember that managed identities are tied directly to the Azure resource (like App Service), while service principals are standalone app registrations. Memory tip: think "no strings attached"—managed identities cut the connection string cord entirely.
AZ-204 Practice Question: Connect to and consume Azure services and third-party services
This AZ-204 practice question tests your understanding of connect to and consume azure services and third-party services. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
Which TWO authentication methods can be used to connect an Azure App Service to an Azure SQL Database without storing connection strings in code or configuration files?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
System-assigned managed identity
Managed identities (system-assigned or user-assigned) and service principals are both identity-based methods that can authenticate to Azure SQL without storing credentials. Option A is wrong because SQL authentication uses username/password stored in configuration. Option B is wrong because the access key is for storage accounts. Option D is wrong because certificates are stored in the app, not managed by Azure identity.
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.
✗
Client certificate installed on the App Service
Why it's wrong here
Certificates require manual management and are not fully managed by Azure.
✗
Storage account access key
Why it's wrong here
Access keys are for Azure Storage, not SQL Database.
✗
SQL Server authentication (username and password)
Why it's wrong here
SQL authentication requires storing credentials in configuration.
✓
System-assigned managed identity
Why this is correct
Managed identity provides a passwordless identity for the App Service.
Related concept
Read the scenario before looking for a memorised answer.
✓
User-assigned managed identity
Why this is correct
User-assigned managed identity also provides a passwordless identity.
Related concept
Read the scenario before looking for a memorised answer.
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 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-204 question in full detail.
Identify which AZ-204 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.
Connect to and consume Azure services and third-party services — This question tests Connect to and consume Azure services and third-party services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: System-assigned managed identity — Managed identities (system-assigned or user-assigned) and service principals are both identity-based methods that can authenticate to Azure SQL without storing credentials. Option A is wrong because SQL authentication uses username/password stored in configuration. Option B is wrong because the access key is for storage accounts. Option D is wrong because certificates are stored in the app, not managed by Azure identity.
What should I do if I get this AZ-204 question wrong?
Identify which AZ-204 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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