The answer is Azure Functions with an Event Hubs trigger and managed identity. This combination is correct because it provides a fully serverless, event-driven compute model that can scale out across multiple Event Hubs partitions to handle high throughput, while managed identity eliminates the need for connection strings or secrets by securely authenticating to Event Hubs via Azure AD. On the AZ-204 exam, this scenario tests your understanding of integrating serverless event processing with identity-based security, often appearing as a distractor against Logic Apps or Azure Stream Analytics—both of which lack the same native, partition-aware scaling for high-throughput event dispatching. A common trap is choosing Logic Apps for its connector simplicity, but it cannot match Functions’ parallel execution per partition. Memory tip: think “Functions fan-out” for high-throughput event routing, and remember that managed identity is the passwordless key to Event Hubs.
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.
You are building a solution that processes events from multiple Azure Event Hubs. Events must be dispatched to different downstream services based on the event type. You need a serverless solution that can handle high throughput and uses managed identity to authenticate to Event Hubs. Which Azure service should you use?
Azure Functions (Event Hubs trigger) with managed identity
Correct. Azure Functions can process events from Event Hubs at scale and supports managed identity for authentication.
B
Azure Stream Analytics
Why wrong: Incorrect. Stream Analytics is for real-time analytics and output to sinks, but it is less flexible for custom routing logic compared to Functions.
C
Azure Logic Apps (Event Hubs connector)
Why wrong: Incorrect. Logic Apps can process events but have lower throughput limits and are not ideal for high-throughput scenarios.
D
Azure Data Factory
Why wrong: Incorrect. Data Factory is for data integration and ETL pipelines, not for real-time event processing.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Azure Functions (Event Hubs trigger) with managed identity
Azure Functions with an Event Hubs trigger supports managed identity authentication, enabling secure, passwordless connections to Event Hubs. It is a serverless, event-driven compute service that can scale to handle high throughput by processing events in parallel across multiple partitions. This makes it the ideal choice for dispatching events to downstream services based on event type.
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.
✓
Azure Functions (Event Hubs trigger) with managed identity
Why this is correct
Correct. Azure Functions can process events from Event Hubs at scale and supports managed identity for authentication.
Related concept
Read the scenario before looking for a memorised answer.
✗
Azure Stream Analytics
Why it's wrong here
Incorrect. Stream Analytics is for real-time analytics and output to sinks, but it is less flexible for custom routing logic compared to Functions.
✗
Azure Logic Apps (Event Hubs connector)
Why it's wrong here
Incorrect. Logic Apps can process events but have lower throughput limits and are not ideal for high-throughput scenarios.
✗
Azure Data Factory
Why it's wrong here
Incorrect. Data Factory is for data integration and ETL pipelines, not for real-time event processing.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Azure Stream Analytics as a general-purpose event dispatcher, but it is specifically a stream analytics engine, not a serverless event router; Azure Functions is the correct choice for event-driven dispatching with managed identity support.
Trap categories for this question
Command / output trap
Incorrect. Stream Analytics is for real-time analytics and output to sinks, but it is less flexible for custom routing logic compared to Functions.
Scenario analysis trap
Incorrect. Logic Apps can process events but have lower throughput limits and are not ideal for high-throughput scenarios.
Detailed technical explanation
How to think about this question
Under the hood, the Azure Functions Event Hubs trigger uses the Event Processor Host (EPH) pattern, which leverages checkpointing and lease management via Azure Storage blobs to ensure exactly-once processing across scaled-out function instances. Managed identity authentication works by assigning a system-assigned or user-assigned identity to the function app, which then uses Azure AD tokens (via the DefaultAzureCredential) to authenticate to the Event Hubs namespace, eliminating the need for connection strings or secrets.
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 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 AZ-204 question in full detail.
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: Azure Functions (Event Hubs trigger) with managed identity — Azure Functions with an Event Hubs trigger supports managed identity authentication, enabling secure, passwordless connections to Event Hubs. It is a serverless, event-driven compute service that can scale to handle high throughput by processing events in parallel across multiple partitions. This makes it the ideal choice for dispatching events to downstream services based on event type.
What should I do if I get this AZ-204 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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