Alibaba ACA-Operator Exam - Topic 8 Question 90 Discussion

Actual exam question for Alibaba's ACA-Operator exam

Question #: 90
Topic #: 8

You can create an event notification rule in Message Service and push notifications to the specified consumer in the form of messages, to receive events from specified Alibaba Cloud resources. Which of the following options are correct statements about the Message Service (MS) service? (Number of correct answers: 2)

AEvent Notifications can cross regions.

BMessage Service provides synchronous notification to ensure the consistency between the message acknowledgment and event processing.

CThe event notification message is retained within the valid time. When you fail to receive an event message, the event notification message is retained based on the specified retry policy.

DThe consumer type of the event notification message can be HTTP Server, Queue, or Topic.

Show Suggested Answer

Suggested Answer: C, D

by Paulina at Oct 28, 2025, 12:30 PM

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Kanisha

1 month ago

C is definitely right. Retaining messages is crucial for reliability.

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Bette

2 months ago

B seems off to me. Synchronous notifications can be tricky.

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Elly

2 months ago

I agree, but I also like D. Different consumer types are useful.

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Malcom

2 months ago

Totally agree with C! Retained messages save the day.

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Gene

2 months ago

Wait, D allows HTTP Server as a consumer? That's new to me!

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Elbert

2 months ago

C is spot on! Retention based on retry policy is crucial.

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Brice

3 months ago

I think B is misleading. Synchronous notifications? Not really how it works.

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Leota

3 months ago

Gotta love those trick questions! Time to brush up on my Alibaba Cloud knowledge.

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Ryan

3 months ago

Haha, I bet the exam writers were having a field day coming up with these tricky options!

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Felton

3 months ago

B is incorrect. Message Service provides asynchronous notification, not synchronous.

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Thaddeus

3 months ago

I’m pretty confident that the consumer types for event notifications include HTTP Server and Queue, but I’m not sure about Topic.

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Shawnda

3 months ago

I have a vague memory that Message Service does provide synchronous notifications, but I can't recall the details about how that works.

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Lindy

4 months ago

I think I came across a similar question about message retention policies in our practice tests, and I believe option C sounds correct.

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Vincenza

4 months ago

I think A and C are correct. Notifications should work across regions.

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Ettie

4 months ago

C is also correct. The event notification message is retained based on the specified retry policy.

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Fletcher

4 months ago

A and D are correct. I'm pretty sure about that.

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Brittney

5 months ago

A) Event Notifications can cross regions. True!

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Anglea

5 months ago

I remember studying that event notifications can indeed cross regions, but I'm not entirely sure if that's always the case.

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Evette

5 months ago

I'm a bit confused on the specifics of the Message Service. I'll have to review my notes and try to remember the key details about event notifications and message retention policies.

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Wilson

5 months ago

I'm feeling confident about this one. I'm pretty sure event notifications can cross regions, and the consumer types include HTTP Server, Queue, and Topic. So A and D are the correct answers.

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Catrice

5 months ago

Okay, let's see. I know the Message Service can push notifications, so that rules out option B. And I'm pretty sure the messages are retained based on a retry policy, so option C sounds right.

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Lashawnda

6 months ago

Hmm, I think I remember learning about the Message Service in one of my cloud computing classes. Let me think this through...

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Amira

6 months ago

I'm not too sure about the details of the Message Service, but I'll try to break this down step-by-step and see if I can eliminate some of the options.

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