Free ACA Cloud Computing Associate Exam ACA-Cloud1 Exam Practice Test

Which three of the following statements about domain name binding to your OSS bucket are correct? (Choose three.)

• Your customized domain name will be audited by Alibaba Cloud
  
• your customized domain name need to be put on record in MIIT (Ministry of Industry and Information Technology)
  
• the number of domain names you bind to one bucket can't exceed 20
  
• mapping a domain name to your bucket endpoint is mandatory
  

Company builds a music download website based on OSS and ECS, and users can download mp3 filesafter registering for the website. Recently, the public network traffic to the OSS has doubled but the increase of registered users is less than 10%. After in-depth analysis, engineers find that many user download requests are raised from search engine but not the website itself. In this case, which of the following measures is thought to be able to address this issue.

• Migrates music files from the OSS to the data disks for ECS instances.
  
• Changes the website access mode to HTTPS.
  
• Limits access sources by configuring ''Anti-leech settings'' of OSS bucket attributes.
  
• Introduce SLB for extra protection.
  

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 relatesto the high availability of OSS?

• Availability actually relies on the underlying hardware, which can break down easily. Once the hard disk malfunctions, it can also lead to permanent data loss.
  
• Data Reliability is not less than 99.99999999%. Data is backed up automatically with multiple redundant copies.
  
• Data has to be backed up by customer manually, which is time-consuming and labor-intensive.
  
• The following features are available: Multiple Authentication and Authorization mechanism, Whitelist, Anti- leech URL, and Master-Sub Account
  

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

• image
  
• snapshot
  
• template
  
• EIP
  

Which of the followings are not the operations that you can do on a cloud disk snapshot? (Choose two.)

• snapshot duplicate
  
• snapshot rollback
  
• snapshot download
  
• snapshot deletion
  

Auto Scaling is a management service that can automatically adjust elastic computing resources based on your business needs and policies. It supports adding an existing ECS instance into the scaling group but imposes certain requirements on instance region. In this case, which of the following statements is true?

• The instance and the scaling group must be in the same region but not necessarily the same zone.
  
• The instance and the scaling group must be in the same region and zone.
  
• The instance and the scaling group can be in different regions and zones.
  
• Each scaling group can span up to two regions. After adding the ECS instance, the number of regions of all the ECS instances in the scaling group must be no greater than two.
  

Which of the following statements is wrong when comparing RDS with self-built database?

• RDS features a high availability of 99.95% while self-built database requires you to implement data protection, primary-standby replication, and RAID all by yourself.
  
• RDS provides automatic backup while self-built database requires you to prepare storage space for backup copies and regularly verify that these copies can be restored.
  
• Self-built database supports quick deployment and elastic scaling.
  
• RDS requires no O&M while self-built database requires a dedicated DBA for maintenance, which results in high HR cost.
  

When we talk about the 'Elastic' feature for ECS product, we are not talking about .

• Elastic Computing
  
• Elastic Storage
  
• Elastic Network
  
• Elastic Administration
  

Your website has high volume of traffic and sudden spikes for a very short time. In this scenario, can manage traffic peak efficiently and maintain a consistent user experience.

• Server Load Balancer
  
• Auto Scaling
  
• RDS
  
• VPC
  

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?

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