Free ACA-Operator – ACA System Operator Practice Test Question

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  Developers can generate a plaintext data key and a ciphertext data key by calling the GenerateDataKey interface.

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  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).

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  The user uses the master key created on KMS to encrypt and decrypt the generated data key.

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  The master key generated by KMS is also kept by the user.
  
  
  

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  The ECS instances in the Scaling Group have not yet installed the CloudMonitor monitoring agent

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  Before triggering the alarm task, the number of instances in the group has reached the maximum number of instances allowed (MaxSize)

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  The instance types chosen in the Scaling Configuration are out-of-stock in the Alibaba
  Cloud Region where the Scaling Group is located

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  The number of instances in the current group exceeds the “expected number of instances” for the Scaling Group
  
  
  

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  visitor's real IP address is stored in the "X-Forwarded-For" HTTP header. It can bedirectly obtained via Apache or NGINX logs.
  

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  In Windows, if IIS is used, after installing the "F5XForwardedFor" extension module, thevisitor's real IP address can be seen via IIS logs.
  

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  You can activate the "record visitor's real IP" function in the Alibaba Cloud CDN console,then you can directly view visitor's IP addresses from the Alibaba Cloud CDN access logs.
  
  
  

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  CPU status of the ECS instance

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  Running processes on the ECS instance

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  Storage space used by OSS buckets

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  ECS network I/O
  
  
  

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  The instance is in the "running" state

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  No instance type (specification) was included in the request parameters

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  The instance has a backup task being executed

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  The targeted RDS instance is a disaster recovery instance
  
  
  

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  Store the files in Cloud Disk and delete the files when Function Compute function call completes.

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  Copy the files to NFS and delete the files when the Function Compute function call completes.

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  Store the files in the /tmp directory on a temporary ECS instance, and delete the files at when the Function Compute function call completes.

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  Copy the files to an OSS bucket with a lifecycle policy configured to delete the files automatically.
  
  
  

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  CEN (Cloud Enterprise Network)

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  Express Connect

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  VPN Gateway

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  NAT Gateway
  
  
  

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  Python

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  XML

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  HCL

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  YAML
  
  
  

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  Oracle

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  MongoDB

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  MySQLo

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  PostgreSQL
  
  
  

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  Migrate music files from the OSS to the data disks for ECS instances

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  Change the website access mode to HTTPS

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  Enable “Hotlink protection” of OSS and use an HTTP Referer whitelist to prevent unauthorized users from accessing your data

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  Use SLB for extra protection