Online Access Free ACA-Cloud1 Exam Questions

Alibaba Cloud Object Storage Service (OSS) is a massive, highly available, secured and cost effective storage service. One of the special characteristics of OSS is its superior data reliability, because of its underlying backup technology and policies. Which of the following statement about OSS backup is correct?

• A.OSS supports 3 internal data copies, so the data can be manually recovered should there be any problem.
• B.OSS supports 3 internal data copies, no human intervention is required to recover the data when anything goes wrong.
• C.OSS leverages RAID0+1 configuration of its underlying physical hard disks. There is no impact even if
  2 hard disks were to fail simultaneously.
• D.Customer has to safeguard their own data. OSS provides various backup interfaces to facilitate offsite backups.

A/Anis a copy of data on a disk at a certain point in time.

• A.EIP
• B.snapshot
• C.template
• D.image

A company uses Alibaba Cloud SLB and Auto Scaling at the same time, hoping this combination can help save O&M cost and provide a stable and reliable system.
However, because they do not have relevant experience, the company's engineers listed some precautions based on their understanding, and turned the list to you for advice.
As an expert of Alibaba Cloud, you tell them only________is correct.

• A.All ECS instances under the same SLB instance must be running on the same operating system
• B.All backend servers under the same SLB instance must be in the same Scaling Group
• C.SLB instances must have Health Check enabled, or they cannot be used together with Auto Scaling
• D.All backend servers under the same SLB instance must have the same configuration

When using Alibaba Cloud SLB, you can set different weights for backend ECS instances. The higher the weight of a backend ECS instance, the more load will be assigned to it. If an SLB instance has 5 ECS instances in the backend server pool, all of which are healthy. Among these 5 ECS instances, the weight of ecs_inst1 is set to 100. Which of the following statements is correct?

• A.100% of loads will be assigned to ecs_inst1, and the rest 4 ECS instances will stay idle.
• B.Based on SLB's working mechanism, approximately 20% of loads will be assigned to ecs_inst1.
• C.Based on request level parameters of external requests, all requests with a request level parameter of 100 will be transferred to ecs_inst1.
• D.We do not know the weight settings of the remaining 4 ECS instances, so we cannot tell what would happen.

Which method is not supported by OSS to create a bucket?

• A.through OSS API/SDK
• B.through ECS instance filesystem directory operation
• C.through cloud console
• D.through oss cmd tool