Alibaba Cloud Certified Associate – Cloud Computing — Question 22

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?

Answer options

• A. OSS supports 3 internal data copies, so the data can be manually recovered should there be any problem.
• B. Customer has to safeguard their own data. OSS provides various backup interfaces to facilitate offsite backups.
• 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. OSS supports 3 internal data copies, no human intervention is required to recover the data when anything goes wrong.

Correct answer: B

Explanation

The correct answer is B because OSS indeed requires customers to manage their own data protection while providing various interfaces for offsite backups. Option A is incorrect since OSS does not allow for manual recovery but rather automates the process. Option C is misleading as OSS does not specify using a RAID0+1 configuration, and option D is wrong because manual intervention is not needed for recovery, but the statement misrepresents how the data recovery process works.