In HUAWEI CLOUD Stack, which of the following features reflect the elasticity of ECSs?

The correct answers are A, B, and D. Huawei’s official ECS documentation highlights several elasticity-related capabilities. It states that Auto Scaling (AS) can automatically add or remove ECSs based on service demand, which directly supports option B. Huawei also states that ECS flavors can be modified, including changes to CPU and memory, which supports D as an elastic scaling feature. In addition, Huawei’s IMS documentation explains that images can be used to create ECSs in batches and, together with AS, support dynamic scale-out, which makes A a valid reflection of ECS elasticity as well.

Option C is not well supported as stated, because Huawei documentation emphasizes flavor modification and online flavor change mainly in the context of scaling resources, especially increasing CPUs and memory, not “specification downgrade” as a core elasticity feature. Option E refers to physical isolation, which is a BMS characteristic rather than an ECS elasticity feature. Therefore, the best verified answer is A, B, D.