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

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

• TRUE
  
• FALSE
  

ECS is a highly flexible service. It can be used independently as a simple web server, or used with otherAlibaba Cloud products, such as OSS and CDN, to provide advanced solutions. ECS can be used in applications such as: . (Choose four.)

• Official corporate websites
  
• large-traffic apps
  
• Databases
  
• simple web applications
  
• no limited online storage
  

RDS provides whitelist access policies. You can set permitted IP addresses and IP network segments to effectively prevent hackers from attacking the server by port scanning.

• TRUE
  
• FALSE
  

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.
  

SQL injection is a common application layer attack, usually through building special input parameters and pass it to web applications to steal or sabotage the application data. Which of the following is the target for SQL injection?

• Web application
  
• Database
  
• Confidential files on the server
  
• Pictures on server
  

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.
  

You built an online shop using Alibaba Cloud services (ECS, RDS, ...etc.) and very soon you'll have a campaign that every customer that invites 3 friends will get a 50% off coupon. To avoid HTTP flood attacks and ensure only genuine customers (not bots) joining the event, which security product should you choose?

• Anti-DDoS Basic
  
• Anti-DDoS pro
  
• WAF
  
• Server Guard
  

Which of the following statements to OSS bucket is not correct?

• Every user can create more than one bucket
  
• Bucket name can be changed after creation
  
• Every bucket should have a unique name
  
• There is no limitation to objects number inside one bucket
  

ECS can be used along with to store static images, videos, and reducing storage fees.

• OSS
  
• Server Load Balancer
  
• RDS
  
• VPC
  

Alibaba Cloud Monitor service stems from years of experience of server monitoring technology in Alibaba group, leveraging the powerful data analysis capability of Alibaba cloud computing platform to provide monitoring service for various clients' applications and servers. A user receives an alert saying that the IOPS utilization rate for an ECS instance exceeds 80%. Yet, he/she is not sure how to handle the situation, the user may obtain help from Alibaba Cloud through the below methods ? (Choose three.)

• Check ECS or CloudMonitor product documents.
  
• Open a ticket to Alibaba Cloud help desk.
  
• Look for answers in Alibaba Cloud forum.
  
• You cannot obtain any help from Alibaba Cloud.