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Alibaba ACA-Operator Exam - Topic 3 Question 100 Discussion

In Alibaba Cloud, a developer finds that the ECS instance he created does nothave public IP assigned. The API method used was ''CreateInstance''. Whichof the following is the most likely reason?
A) The developer did not call AllocatePublicIpAdress (an additional API call), which is needed to assign a public IP
B) The CreateSecurityGroup API call was not made
C) The CreateDisk API call was not made
D) The ECS was not restarted after being created

Alibaba ACA-Operator Exam - Topic 3 Question 100 Discussion

Actual exam question for Alibaba's ACA-Operator exam
Question #: 100
Topic #: 3
[All ACA-Operator Questions]

In Alibaba Cloud, a developer finds that the ECS instance he created does not

have public IP assigned. The API method used was ''CreateInstance''. Which

of the following is the most likely reason?

Show Suggested Answer Hide Answer
Suggested Answer: A

https://www.alibabacloud.com/help/doc-detail/25544.htm


by Edda at Jun 18, 2026, 06:40 PM

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Elvera
24 days ago
I’m not so sure. B could be a factor too, but A feels right.
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Deonna
29 days ago
Agreed, A makes the most sense. No public IP without that call.
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Rosann
1 month ago
I think it's A. You need to allocate a public IP separately.
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Ora
1 month ago
Wait, are you sure about A? That seems a bit odd.
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Roy
1 month ago
I disagree, D doesn't make sense here.
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Cherilyn
2 months ago
No way it's B or C, those aren't related to IP assignment.
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Franchesca
2 months ago
I thought it was automatic, but I guess not!
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Sharee
2 months ago
Definitely A, you need to allocate a public IP separately.
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Elvis
2 months ago
I don't think restarting the ECS instance would affect the public IP assignment, so I'm leaning towards A as well.
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Lashon
2 months ago
I practiced a similar question where the public IP was also a separate step. Could it be A again?
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Tiera
3 months ago
I'm not entirely sure, but I feel like the security group might not be related to the public IP issue. Maybe it's A?
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Remedios
3 months ago
I remember reading that you need to explicitly allocate a public IP after creating an instance, so I think A is the right answer.
upvoted 0 times
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