ACA-Developer 무료 덤프문제 온라인 액세스

Which of the following options is correct, regarding Object ACL in Alibaba Cloud's Object Storage Service (OSS)?

• A."Private" indicates that an object is a private resource, that is, only the owner of the object has read and write permissions on the object, and other users can read but have no permission to modify or delete the object.
• B.If the permissions of an object are not set, the permissions of the object are inherited from the bucket.
• C.You can set the ACL associated with an object by examining the X-OSS-Object-ACL header in the HEAD request, when making the PutObjectACL API call.
• D.Object ACL is an object-level (not bucket level) permission control mechanism. There are currently three levels of access rights: private, public-read, and public-read-write.

Which of the following statements are correct, with regard to Alibaba Cloud Log Service? (Number of correct answers: 3)

• A.Each log written to the Log Service backend will be saved in triplicate (across three separate physical servers)
• B.The Logstore backend service is deployed on a single machine to complete the real-time persistence, indexing, query and delivery of Logstore data to MaxCompute
• C.As an agent for collecting logs, Logtail can collect logs from existing system log files in a non-intrusive manner
• D.The Log Service frontend service adopts an LVS + NGINX architecture

Which of the following options is not included in Object Storage Service (OSS) object URLs?

• A.Bucket name
• B.Zone name
• C.Region name
• D.Filename

Serverless Workflow allows you to orchestrate distributed tasks in sequence, branch, and parallel modes, and ensure that tasks are reliably coordinated according to your workflow logic. Which of the following service integration modes is not supported by Serverless Workflow?

• A.Synchronization mode
• B.Request response mode
• C.Asynchronous mode
• D.Waiting for callback mode

When using Alibaba Cloud CDN, a visitor's request will first be routed to a CDN edge node, and in the event of a cache miss at this edge node, the node will fetch data from the origin site (back-to-source request). Even with this redirection, it is possible for the origin site to see the visitors real IP address. Which of the following statements about obtaining the visitor's real IP address are correct? (Number of correct answers: 2)

• A.A visitor's real IP address can only be obtained by modifying the site or web application.
• B.A visitor's real IP address is stored in the "X-Forwarded-For" HTTP header It can be directly obtained via Apache or NGINX logs.
• C.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.
• D.In Windows, if IIS is used, after installing the "F5XForwardedFor" extension module, the visitor's real IP address can be seen via IIS logs.