Alibaba ACA-Cloud1 Exam Practice Test Instant Access

Question 1

Some applications may encounter large traffic fluctuations within a short period. When ECS is used with

, the number of ECS instances is automatically adjusted based on traffic.

AServer Load Balancer

BRDS

CAuto Scaling

DOSS

Answer : C

Question 2

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.

ASLB instances must have Health Check enabled, or they cannot be used together with Auto Scaling

BAll ECS instances under the same SLB instance must be running on the same operating system

CAll backend servers under the same SLB instance must be in the same Scaling Group

DAll backend servers under the same SLB instance must have the same configuration

Answer : A

Question 3

feature in Server Load Balancer means that it can forward the access requests from a single user to the same ECS instance within a certain period to ensure session continuity.

Asession persistence

Bhealth check

CWeighted Round Robin

Dleast connections scheduling

Answer : A

Question 4

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?

AOSS supports 3 internal data copies, so the data can be manually recovered should there be any problem.

BCustomer has to safeguard their own data. OSS provides various backup interfaces to facilitate offsite backups.

COSS leverages RAID0+1 configuration of its underlying physical hard disks. There is no impact even if 2 hard disks were to fail simultaneously.

DOSS supports 3 internal data copies, no human intervention is required to recover the data when anything goes wrong.

Answer : B

Question 5

Alibaba Cloud Object Storage Service (OSS) is a massive, highly available, secured and cost effective storage service. OSS is superior than self-built storage in all these aspects. Which of the following advantage relates

to the high availability of OSS?

AAvailability actually relies on the underlying hardware, which can break down easily. Once the hard disk malfunctions, it can also lead to permanent data loss.

BData Reliability is not less than 99.99999999%. Data is backed up automatically with multiple redundant copies.

CData has to be backed up by customer manually, which is time-consuming and labor-intensive.

DThe following features are available: Multiple Authentication and Authorization mechanism, Whitelist, Anti- leech URL, and Master-Sub Account

Answer : B

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