Alibaba ACA-Operator practice materials Questions Answers

Exam Code:
ACA-Operator
Exam Name:
ACA System Operator Certification Exam
Last Update:
Jun 01,2026

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Alibaba ACA-Operator Questions for Alibaba Cloud Certified Associate Certification Exam 2026

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Questions & Answers PDF

• Question 1

  

  In order to deal with sudden spikes in traffic, Company A uses Alibaba CloudAuto Scaling to set up an alarm trigger task (growing the Scaling Group whenthe average memory utilization on ECS instances exceeds 80%). During thetest, it was found that the alarm task was not executed successfully. Which ofthese could be possible causes? (Number of correct answers: 3)

  • The ECS instances in the Scaling Group have not yet installed the CloudMonitor monitoring agent
  • Before triggering the alarm task, the number of instances in the group has reached the maximum number of instances allowed (MaxSize)
  • The instance types chosen in the Scaling Configuration are out-of-stock in the Alibaba Cloud Region where the Scaling Group is located
  • The number of instances in the current group exceeds the ''expected number of instances'' for the Scaling Group

  Reveal Answer Answer: 1,,2,,3 Next Question

• Question 2

  

  Which Alibaba Cloud service is an automated operations and maintenance (O&M) service to execute O&M tasks?

  • Operation Orchestration Service (OOS)
  • Maintenance Orchestration Service (MOS)
  • Resource Orchestration Service (ROS)
  • Resource Access Management (RAM)

  Reveal Answer Answer: 1 Next Question

• Question 3

  

  Alibaba Cloud CloudMonitor is a service that monitors Alibaba Cloud resources and internet applications. Which of the following functions are provided by CloudMonitor? (Number of correct answers: 4)

  • Site monitoring
  • Cloud product monitoring
  • Custom monitoring
  • Alerts
  • Custom firewall

  Reveal Answer Answer: 1,,2,,3,,4 Next Question

• Question 4

  

  In Alibaba Cloud, a developer finds that the ECS instance he created does nothave public IP assigned. The API method used was ''CreateInstance''. Whichof the following is the most likely reason?

  • The developer did not call AllocatePublicIpAdress (an additional API call), which is needed to assign a public IP
  • The CreateSecurityGroup API call was not made
  • The CreateDisk API call was not made
  • The ECS was not restarted after being created

  Reveal Answer Answer: 1 Next Question

• Question 5

  

  Which Alibaba Cloud service is used to manage cloud computing resources including the deployment?

  • Operation Orchestration Service (OOS)
  • Maintenance Orchestration Service (MOS)
  • Resource Orchestration Service (ROS)
  • Resource Access Management (RAM)

  Reveal Answer Answer: 3 Next Question

• Question 6

  

  A company is developing a music application based on OSS and ECS, their users can download mp3 files after signing up for the application. Recently, the public network traffic to the OSS has doubled but the increase of registered users is less than 10%. After in-depth analysis, system operators find that many download requests are requested from the external search engine. In this case, which of the following measures is thought to be able to address this issue?

  • Migrate music files from the OSS to the data disks for ECS instances
  • Change the website access mode to HTTPS
  • Enable ''Hotlink protection'' of OSS and use an HTTP Referer whitelist to prevent unauthorized users from accessing your data
  • Use SLB for extra protection

  Reveal Answer Answer: 4 Next Question

• Question 7

  

  Which database utility is suitable for managing databases in a centralized manner?

  • DMS
  • DBS
  • DTS
  • DAS

  Reveal Answer Answer: 1 Next Question

• Question 8

  

  After you enable health checks of Server Load Balancer (SLB), when one backend ECS instance is declared as unhealthy, which of the following statements is correct?

  • Requests are forwarded to other normal ECS instances and the unhealthy ECS instance is shutted down
  • Requests are forwarded to other normal ECS instances. When the faulty ECS instance becomes normal, SLB forwards requests to the ECS instance again
  • Requests are not forwarded to the ECS instances and you get back a 400 error
  • Requests are not forwarded to the ECS instances and you get back a 500 error

  Reveal Answer Answer: 2 Next Question

• Question 9

  

  You need to log all actions taken by users of your Alibaba Cloud account,whether via the command line tools or the web console. Which Alibaba Cloudproduct can you use to create a log of user operations?

  • CloudMonitor
  • ActionTrail
  • Cloud Configo
  • Resource Group

  Reveal Answer Answer: 2 Next Question

• Question 10

  

  A developer needs to use some sensitive business data and operational data in the process of developing a program, but the data should be protected (encrypted or anonymized) as much as possible. In order to facilitate and secure management of data encryption keys, the developer can use Alibaba Cloud Key Management Service (KMS) envelope encryption technology. Which of these statements is NOT correct, regarding KMS?

  • Developers can generate a plaintext data key and a ciphertext data key by calling the GenerateDataKey interface.
  • Envelope encryption is an encryption mechanism similar to digital envelope technology. The technology allows you to store, transfer and use encrypted data by encapsulating their Data Keys (DKs) in an envelope, instead of \y encrypting/decrypting data directly with Customer Master Keys (CMKs).
  • The user uses the master key created on KMS to encrypt and decrypt the generated data key.
  • The master key generated by KMS is also kept by the user.

  Reveal Answer Answer: 1,,2,,3 Next Question

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