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ACA System Operator Certification Question and Answers

ACA System Operator Certification

Last Update May 4, 2024
Total Questions : 62

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Questions 1

Which command should you run to create the resources described in the Terraform scripts?

Options:

A.  

terraform init

B.  

terraform plan

C.  

terraform destroy

D.  

terraform apply

Discussion 0
Questions 2

Which of the following statements about ECS Snapshot is NOT correct?

Options:

A.  

You can manually create snapshots

B.  

You can create automatic snapshots

C.  

You can roll back a disk by using a snapshot

D.  

You can create an ECS instance from a snapshot

Discussion 0
Questions 3

Which of the following steps is NOT mandatory when creating an API through Alibaba Cloud API Gateway?

Options:

A.  

Define basic API information

B.  

Attach a domain name

C.  

Define API Request parameters

D.  

Define the API backend service

Discussion 0
Questions 4

ApsaraDB for HBase is a cost-effective cloud-based intelligent SQL service that is of high scalability and compatible with the open source HBase.

Options:

A.  

True

B.  

False

Discussion 0
Questions 5

Which of these log formats is currently supported by Alibaba Cloud’s ActionTrail?

Options:

A.  

XML

B.  

HTML

C.  

JSON

D.  

Markdown

Discussion 0
Questions 6

A Developer is creating a Function Compute function. This function requires around 1 GB of temporary storage for files while executing. These files will not be needed after the function is completed for a fixed period. How can this developer MOST efficiently handle the temporary files?

Options:

A.  

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

B.  

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

C.  

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

D.  

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

Discussion 0
Questions 7

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?

Options:

A.  

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

B.  

Change the website access mode to HTTPS

C.  

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

D.  

Use SLB for extra protection

Discussion 0
Questions 8

Which of the following options are correct for Multipart Upload and Resumable Upload in Object Storage Service (OSS)? (Number of correct answers: 3)

Options:

A.  

Use Multipart Upload to upload multiple parts of a file in parallel to speed up the upload process

B.  

Multipart Upload is usually used when the size of the file to be uploaded is large

C.  

If the upload fails due to an accident during the uploading of fragments, you need to upload all the fragments again

D.  

After an upload is interrupted, the portions of the file which have successfully uploaded prior to the interruption will be saved in the OSS bucket

Discussion 0
Questions 9

You can create an event notification rule in Message Service and push notifications to the specified consumer in the form of messages, to receive events from specified Alibaba Cloud resources. Which of the following options are correct statements about the Message Service (MS) service? (Number of correct answers: 2)

Options:

A.  

Event Notifications can cross regions.

B.  

Message Service provides synchronous notification to ensure the consistency between the message acknowledgment and event processing.

C.  

The event notification message is retained within the valid time. When you fail to receive an event message, the event notification message is retained based on the specified retry policy.

D.  

The consumer type of the event notification message can be HTTP Server, Queue, or Topic.

Discussion 0
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