- A
Use a Service Bus trigger with the 'PeekLock' mode and set the 'IsSessionsEnabled' property to false
Why wrong: Without sessions, the queue does not guarantee order; messages may be processed out of sequence.
- B
Use a Service Bus trigger with the 'ReceiveAndDelete' mode
Why wrong: ReceiveAndDelete removes the message immediately; if processing fails, the message is lost, violating exactly-once processing.
- C
Use a Service Bus trigger with the 'PeekLock' mode and set the 'IsSessionsEnabled' property to true
Sessions provide FIFO order within a session, and PeekLock allows the Logic App to complete or abandon the message, ensuring exactly-once processing.
- D
Use an Event Grid trigger for Service Bus
Why wrong: Event Grid triggers on events from Service Bus, but does not support ordered message processing or exactly-once guarantees.
Quick Answer
The correct choice is a Service Bus trigger with PeekLock mode and the IsSessionsEnabled property set to true. This configuration ensures FIFO ordering and exactly-once processing because Service Bus sessions group related messages under a common session ID, guaranteeing that messages within the same session are delivered in the order they were enqueued, while PeekLock mode locks each message during processing to prevent duplicate delivery. On the AZ-204 exam, this scenario tests your understanding of how to enforce ordered, reliable message consumption in distributed systems—a common trap is assuming a standard queue trigger alone provides ordering, but without sessions, messages can be processed out of order by competing consumers. Remember the mnemonic: “Sessions for Sequence, PeekLock for Precision”—if you need strict order and no duplicates, always pair sessions with PeekLock.
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.
You are building an Azure Logic App that must consume messages from an Azure Service Bus queue. The queue messages are JSON payloads containing order information. The Logic App must process each message exactly once and in the order they are received. You need to configure the trigger in the Logic App. Which trigger type and property should you choose?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Use a Service Bus trigger with the 'PeekLock' mode and set the 'IsSessionsEnabled' property to true
Option C is correct because Service Bus sessions provide first-in-first-out (FIFO) ordering and exactly-once processing. By enabling sessions (IsSessionsEnabled = true) and using PeekLock mode, the Logic App can lock a message while processing, ensuring it is not delivered to other consumers, and sessions guarantee that messages with the same session ID are processed in order. This meets the requirement of processing each message exactly once and in the order received.
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.
- ✗
Use a Service Bus trigger with the 'PeekLock' mode and set the 'IsSessionsEnabled' property to false
Why it's wrong here
Without sessions, the queue does not guarantee order; messages may be processed out of sequence.
- ✗
Use a Service Bus trigger with the 'ReceiveAndDelete' mode
Why it's wrong here
ReceiveAndDelete removes the message immediately; if processing fails, the message is lost, violating exactly-once processing.
- ✓
Use a Service Bus trigger with the 'PeekLock' mode and set the 'IsSessionsEnabled' property to true
Why this is correct
Sessions provide FIFO order within a session, and PeekLock allows the Logic App to complete or abandon the message, ensuring exactly-once processing.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use an Event Grid trigger for Service Bus
Why it's wrong here
Event Grid triggers on events from Service Bus, but does not support ordered message processing or exactly-once guarantees.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume PeekLock mode alone guarantees ordering, but without sessions, multiple concurrent trigger instances can pick up messages from the same queue out of order, breaking the FIFO requirement.
Detailed technical explanation
How to think about this question
Service Bus sessions use a session ID to group related messages into a logical sequence; the broker ensures that messages within a session are delivered in order and that only one consumer (or Logic App trigger) processes that session at a time. Under the hood, PeekLock mode uses a lock token and a lock duration (default 30 seconds) to prevent other consumers from seeing the message until it is completed or abandoned. In a real-world scenario, if orders must be processed sequentially (e.g., order creation before payment), sessions enforce that all messages with the same session ID (e.g., order ID) are handled by the same trigger instance, avoiding race conditions.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Questions learners often ask
What does this AZ-204 question test?
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: Use a Service Bus trigger with the 'PeekLock' mode and set the 'IsSessionsEnabled' property to true — Option C is correct because Service Bus sessions provide first-in-first-out (FIFO) ordering and exactly-once processing. By enabling sessions (IsSessionsEnabled = true) and using PeekLock mode, the Logic App can lock a message while processing, ensuring it is not delivered to other consumers, and sessions guarantee that messages with the same session ID are processed in order. This meets the requirement of processing each message exactly once and in the order received.
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.
About these practice questions
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Last reviewed: Jun 11, 2026
This AZ-204 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the AZ-204 exam.
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