Alibaba Cloud Object Storage Service (OSS) Is a Massive, Highly

question 8

Multiple Choice

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) 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.

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Definitions:

Subducted Plate

A tectonic plate that is being forced underneath another plate into the Earth's mantle at a convergent boundary.

Ophiolite

A portion of the Earth's oceanic crust along with the upper mantle beneath it that has been elevated and is now visible above the surface of the sea.

Oceanic Crust

The part of the Earth's crust that underlies the ocean basins, generally thinner and more dense than continental crust, formed at mid-ocean ridges and recycled into the mantle at subduction zones.

Sheeted Dikes

A geological formation consisting of numerous parallel dikes formed when magma intrudes into a crack then solidifies.