ACP-Cloud1 試験問題を無料オンラインアクセス

A user builds an ECS + SLB + RDS architecture on Alibaba Cloud, with Auto Scaling to dynamically manage ECS instances. For business needs, they use ApsaraDB for Redis as a cache for hot data, requiring ECS instances to be added or removed from the Redis whitelist as they scale. As an Alibaba Cloud architect, which three Auto Scaling and OOS features would you recommend to automate adding and removing instances from the Redis whitelist? (Choose three.)

• A.OOS Template
• B.Instance launch template
• C.MNS
• D.Auto-Scaling lifecycle hooks

Auto Scaling can automatically adjust the number of ECS instances based on user-defined scaling rules to meet service needs. If a user cannot predict service changes or does not have enough history data, he/she can still use dynamic scaling mode to automatically add/remove ECS instances based on certain Cloud Monitor performance metrics (such as the CPU utilization rate)

• A.True
• B.False

Alibaba Cloud's Object Storage Service (OSS) can be used to store a large amount of data, but there is still a maximum number of files in a single bucket.

• A.True
• B.False

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 due to its underlying backup technology and policies. Which of the following statements about OSS backup is correct?

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

When using Alibaba Cloud SLB to forward layer 7 (HTTP) service requests. SLB will replace the IP address in the HTTP header file to forward requests.
Therefore the source IP address that can be seen on the backend ECS instance is the IP address of SLB instead of the clients real IP address.

• A.True
• B.False