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.

Correct Answer: B 🗳️

In some cases, you can purchase Elastic Compute Service (ECS) instances in Pay-As-You-Go mode to meet the demands for requiring additional computing resources in a particular period of time, and set auto release time to release these Pay-As-You-Go instances later. ___________________ is a correct description of this operation.

Correct Answer: C 🗳️

A challenging thing in gaming industry is the unpredictable and fluctuating business traffic. For example, 1 ECS instance is enough to meet all business demands today, however we may need 10 ECS instances tomorrow.
In this situation, it is difficult to predict the number of ECS instances required. If we use too few ECS instances, we may not be able to cope with business peaks; whereas if we use too many ECS instances, we may introduce unnecessary costs.
On Alibaba Cloud, _______________ is the best product portfolio to cope with the gaming scenario described above.

Correct Answer: A 🗳️

You deployed a MySQL database on an Alibaba Cloud Elastic Compute Service (ECS) instance. Due to traffic increase, there are more and more O&M tasks, such as database backup, Master/Slave database synchronization, and these tasks are becoming overwhelmingly.
Therefore, you can use Alibaba Cloud ___________ to solve this issue.

Correct Answer: B 🗳️