Online Questions - Valid Practice To your ACA-Operator Exam (Updated 63 Questions)
Practice To ACA-Operator - Remarkable Practice On your ACA System Operator Certification Exam
NEW QUESTION 34
Serverless Workflow allow 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. Waiting for callback mode
- B. Request response mode
- C. Asynchronous mode
- D. Synchronization mode
Answer: C
Explanation:
Explanation
Asynchronous mode is only possible with the combination of MNS
service.https://static-aliyun-doc.oss-cnhangzhou.aliyuncs.com/download%2Fpdf%2F122479%2FBest_Practices_
NEW QUESTION 35
A developer accesses logs in a Log Service Logstore via the API. The error code returned by the server is 404.
Which of these could be the cause?
- A. The log project (Project) does not exist
- B. Server is busy: please try later
- C. Server internal error
- D. The requested digital signature does not match
Answer: A
Explanation:
Explanation
Error 404 ProjectNotExist: The error message returned because the specifiedproject does not exist.https://www.alibabacloud.com/help/doc-detail/29018.htm
NEW QUESTION 36
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?
- A. Enable "Hotlink protection" of OSS and use an HTTP Referer whitelist to prevent unauthorized users from accessing your data
- B. Use SLB for extra protection
- C. Change the website access mode to HTTPS
- D. Migrate music files from the OSS to the data disks for ECS instances
Answer: B
Explanation:
Explanation
You can configure a HTTP Referer whitelist for a bucket to prevent extra fees caused by unauthorized access to the bucket.
https://www.alibabacloud.com/help/doc-detail/31901.htm
NEW QUESTION 37
Which Alibaba Cloud service is an automated operations and maintenance (O&M) service to execute O&M tasks?
- A. Resource Orchestration Service (ROS)
- B. Resource Access Management (RAM)
- C. Maintenance Orchestration Service (MOS)
- D. Operation Orchestration Service (OOS)
Answer: D
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/120556.htm
NEW QUESTION 38
Which database utility is suitable for managing databases in a centralized manner?
- A. DTS
- B. DBS
- C. DMS
- D. DAS
Answer: C
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/47550.htm
NEW QUESTION 39
Which of the following options are correct for Multipart Upload and Resumable Upload in Object Storage Service (OSS)? (Number of correct answers: 3)
- 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
Answer: A,B,D
NEW QUESTION 40
Tracing Analysis is used to analyze and diagnose performance bottlenecks in a distributed application architecture and make microservice development and diagnostics more efficient.
- A. True
- B. False
Answer: A
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/90277.htm
NEW QUESTION 41
You are responsible for the system operations of a product and have implemented the cloud infrastructure in the Alibaba Cloud platform. When business loads increase, _______ automatically adds ECS instances to ensure sufficient computing capabilities. When business loads decrease, the same service automatically removes ECS instances to save costs. Which service are you using?
- A. Resource Orchestration Service (ROS)
- B. Auto Scaling
- C. Resource Access Management (RAM)
- D. Server Load Balancer (SLB)
Answer: A
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/25857.htm
NEW QUESTION 42
Which command should you run to create the resources described in the Terraform scripts?
- A. terraform destroy
- B. terraform init
- C. terraform apply
- D. terraform plan
Answer: C
Explanation:
Explanation
https://www.terraform.io/docs/cli/commands/apply.html
NEW QUESTION 43
Which of the following web applications are suitable for deployment on Simple Application Server (SAS), as compared with ECS? (Number of correct answers: 3)
- A. Set up a NoSQL database service
- B. Quickly build a personal, learning, or test environment
- C. Quickly build a personal blog website
- D. Quickly build serverless site using Function Compute
- E. Quickly build a small e-commerce website
Answer: B,C,E
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/58620.htm
NEW QUESTION 44
ApsaraDB for HBase is a cost-effective cloud-based intelligent SQL service that is of high scalability and compatible with the open source HBase.
- A. False
- B. True
Answer: A
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/49501.htm
NEW QUESTION 45
In Alibaba Cloud, a developer finds that the ECS instance he created does not have public IP assigned. The API method used was "CreateInstance". Which of the following is the most likely reason?
- A. The CreateSecurityGroup API call was not made
- B. The ECS was not restarted after being created
- C. The CreateDisk API call was not made
- D. The developer did not call AllocatePublicIpAdress (an additional API call), which is needed to assign a public IP
Answer: D
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/25544.htm
NEW QUESTION 46
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?
- A. Requests are forwarded to other normal ECS instances and the unhealthy ECS instance is shutted down
- B. Requests are not forwarded to the ECS instances and you get back a 500 error
- C. Requests are forwarded to other normal ECS instances. When the faulty ECS instance becomes normal, SLB forwards requests to the ECS instance again
- D. Requests are not forwarded to the ECS instances and you get back a 400 error
Answer: C
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/27702.htm
NEW QUESTION 47
Which of these are important concepts in Terraform's configuration language, HCL? (Number of correct answers: 3)
- A. Service Mesh
- B. Variable
- C. Resource
- D. Provider
Answer: B,C,D
NEW QUESTION 48
If you have a Node.js based application and you plan to migrate it to Alibaba Cloud Function Compute, which of the following steps is unnecessary?
- A. Configure program startup commands and access ports in the Function Compute console
- B. Create a single web application and upload the corresponding code package via the Function Compute console (or fcli)
- C. Manually install the Node.js in the Function Compute console
- D. Start and verify the application in the Function Compute console
Answer: C
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/73329.htm
NEW QUESTION 49
Which of the following steps is NOT mandatory when creating an API through Alibaba Cloud API Gateway?
- A. Attach a domain name
- B. Define API Request parameters
- C. Define basic API information
- D. Define the API backend service
Answer: A
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/29478.htm
NEW QUESTION 50
Cloud Config tracks configuration changes of your resources and evaluates configuration compliance.
- A. True
- B. False
Answer: A
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/127388.htm
NEW QUESTION 51
Which of the following fields should be defined in the Alibaba Cloud Terraform Provider Configuration? (Number of correct answers: 3)
- A. access_key
- B. image_id
- C. ecret_key
- D. region
Answer: A,C,D
Explanation:
Explanation
https://www.terraform.io/docs/language/providers/requirements.html
NEW QUESTION 52
Which of the following engines is NOT supported by PolarDB?
- A. Oracle
- B. MongoDB
- C. PostgreSQL
- D. MySQLo
Answer: B
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/58764.htm
NEW QUESTION 53
How does Cloud Config get permission to gather information about other Alibaba Cloud services?
- A. It gets automatic permission to access everything, because it is an Alibaba Cloud service
- B. By storing a copy of your password
- C. An Access Key
- D. A RAM Role
Answer: D
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/156642.htm
NEW QUESTION 54
As the system administrator of a multinational company, you are responsible for the accounts and resources management on the cloud. Which of the following solutions are suitable for your company's IT Governance? (Number of correct answers: 3)
- A. Use Cloud Config and Action Trail for compliance and audit
- B. Stop using Action Trail and Cloud Config to save the storage cost
- C. Use CEN for interconnecting different networks globally, use shared VPC to share services between different organizations
- D. Use role-based SSO for Identities access, use resource directory to manage the resources in shared service account and master account
- E. Use one single VPC for all the resources to have the best performance
Answer: A,C,D
Explanation:
Explanation
https://www.alibabacloud.com/solutions/it-governance
NEW QUESTION 55
________________ is a fully-managed event-driven computing service that allows you to run code in an elastic and reliable way?
- A. Function Compute
- B. Elastic Compute Service (ECS)
- C. Serverless Workflow
- D. Batch Compute
Answer: A
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/52895.htm
NEW QUESTION 56
Which of the following Alibaba Cloud services offers a software-defined wide area network (SD-WAN) solution based on cloud-native technologies?
- A. VPN Gateway
- B. Smart Access Gateway (SAG)
- C. NAT Gateway
- D. Content Delivery Network (CDN)
Answer: B
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/69227.htm
NEW QUESTION 57
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