Alibaba Cloud Certified Professional – Cloud Computing — Question 3

When you initiate a request via an Open API provided by Alibaba Cloud Elastic Compute Service (ECS), whether the request is initiated successfully or not, the server will return ______________________ as a unique identifier.

Answer options

• A. MessageId
• B. RequestId
• C. ResponseId
• D. Timestamp

Correct answer: B

Explanation

The correct answer is RequestId because it serves as a unique identifier for each request made to the ECS API, regardless of its success. The other options, such as MessageId, ResponseId, and Timestamp, do not fulfill the role of identifying the request uniquely in the context provided.