The answer is to use Managed Identity, because it enables Azure Stream Analytics to authenticate to Event Hubs without storing any connection strings or secrets in code. Managed Identity works by assigning an Azure Active Directory identity to the Stream Analytics job, which can then securely access Event Hubs and other Azure resources like Data Lake Storage Gen2 using role-based access control. On the AZ-204 exam, this scenario tests your understanding of identity-based authentication for Azure services, often appearing as a trap where developers default to connection strings or shared access signatures. A common mistake is choosing Shared Access Signature, but remember that any token or key stored in code or configuration violates the principle of zero-trust security. The key memory tip is: if the question says “no stored credentials,” think Managed Identity—it’s the only option that eliminates secrets entirely by using Azure AD authentication.
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. 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.
A company uses Azure Event Hubs to ingest telemetry data from IoT devices. The data is processed by a stream analytics job that outputs to Azure Data Lake Storage Gen2. The developer needs to ensure that the stream analytics job can authenticate to Event Hubs without storing connection strings in code. Which authentication method should the developer use?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use Managed Identity
Option B is correct because Managed Identity allows Azure resources to authenticate to other Azure services without storing credentials. Option A is incorrect because Shared Access Signature requires a token stored somewhere. Option C is incorrect because connection strings expose secrets. Option D is incorrect because a client certificate would need to be stored.
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.
✗
Use a connection string with the Event Hubs namespace
Why it's wrong here
Connection strings contain secrets and should not be stored in code.
✗
Use a client certificate
Why it's wrong here
Client certificates also need to be stored securely.
✗
Use a Shared Access Signature (SAS) token
Why it's wrong here
SAS token still needs to be stored securely.
✓
Use Managed Identity
Why this is correct
Managed Identity provides secure authentication without storing credentials.
Related concept
Static NAT maps one inside address to one outside address.
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-204 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-204 NAT questions on configuration and troubleshooting.
Connect to and consume Azure services and third-party services — This question tests Connect to and consume Azure services and third-party services — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Use Managed Identity — Option B is correct because Managed Identity allows Azure resources to authenticate to other Azure services without storing credentials. Option A is incorrect because Shared Access Signature requires a token stored somewhere. Option C is incorrect because connection strings expose secrets. Option D is incorrect because a client certificate would need to be stored.
What should I do if I get this AZ-204 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-204 NAT questions on configuration and troubleshooting.
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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