ACA-Operator Practice Exam Tests Latest Updated on Dec-2021
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NEW QUESTION 24
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 ECS was not restarted after being created
- B. The CreateDisk API call was not made
- C. The developer did not call AllocatePublicIpAdress (an additional API call), which is needed to assign a public IP
- D. The CreateSecurityGroup API call was not made
Answer: C
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/25544.htm
NEW QUESTION 25
Which of the following features are unique to Alibaba Cloud Container Registry, as compared with Docker Hub? (Number of correct answers: 2)
- A. You can set your image repository access to public or private.
- B. For source code hosted on websites outside China, Container Registry can use servers outside China to build Docker images, even when you are using a Container Registry instance in Mainland China.
- C. You can create and delete image repositories in different regions based on your needs.
- D. Container Registry can automatically build new Docker images when source code changes.
Answer: B,C
NEW QUESTION 26
In order to deal with sudden spikes in traffic, Company A uses Alibaba Cloud Auto Scaling to set up an alarm trigger task (growing the Scaling Group when the average memory utilization on ECS instances exceeds 80%). During the test, it was found that the alarm task was not executed successfully. Which of these could be possible causes? (Number of correct answers: 3)
- A. The ECS instances in the Scaling Group have not yet installed the CloudMonitor monitoring agent
- B. Before triggering the alarm task, the number of instances in the group has reached the maximum number of instances allowed (MaxSize)
- C. The number of instances in the current group exceeds the "expected number of instances" for the Scaling Group
- D. The instance types chosen in the Scaling Configuration are out-of-stock in the Alibaba Cloud Region where the Scaling Group is located
Answer: A,B,D
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/74853.htm
NEW QUESTION 27
Which database utility is suitable for database migration?
- A. DAS
- B. DMS
- C. DTS
- D. DBS
Answer: C
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/176063.htm
NEW QUESTION 28
Which of the following data volume types is not supported by Elastic Container Instance (ECI)?
- A. NFS
- B. FixedVolume
- C. ConfigFile
- D. EmptyDir
Answer: B
Explanation:
Explanation
FlexVolume is the correct one
https://www.alibabacloud.com/help/doc-detail/90672.htm
NEW QUESTION 29
Which of these are important concepts in Terraform's configuration language, HCL? (Number of correct answers: 3)
- A. Variable
- B. Service Mesh
- C. Provider
- D. Resource
Answer: A,C,D
NEW QUESTION 30
Which of these services can be used to monitor Alibaba Cloud resources and send alerts? (Number of correct answers: 3)
- A. CloudMonitor
- B. Cloud Config
- C. ActionTrail
- D. Object Storage Service (OSS)
Answer: A,B,C
Explanation:
Explanation
OSS is an object storage service.
NEW QUESTION 31
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. The requested digital signature does not match
- D. Server internal error
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 32
Which of the following engines is NOT supported by PolarDB?
- A. Oracle
- B. MongoDB
- C. MySQLo
- D. PostgreSQL
Answer: B
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/58764.htm
NEW QUESTION 33
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. Resource Access Management (RAM)
- C. Auto Scaling
- D. Server Load Balancer (SLB)
Answer: A
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/25857.htm
NEW QUESTION 34
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. Use SLB for extra protection
- B. Migrate music files from the OSS to the data disks for ECS instances
- C. Change the website access mode to HTTPS
- D. Enable "Hotlink protection" of OSS and use an HTTP Referer whitelist to prevent unauthorized users from accessing your data
Answer: A
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 35
Which of these Alibaba Cloud services are used for security (either credentials management, logging, or auditing?) (Number of correct answers: 3)
- A. Table store
- B. ActionTrail
- C. Key Management Service (KMS)
- D. Log Service
Answer: B,C,D
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/27280.htm
NEW QUESTION 36
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 not forwarded to the ECS instances and you get back a 400 error
- 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 forwarded to other normal ECS instances and the unhealthy ECS instance is shutted down
Answer: C
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/27702.htm
NEW QUESTION 37
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 role-based SSO for Identities access, use resource directory to manage the resources in shared service account and master account
- B. Stop using Action Trail and Cloud Config to save the storage cost
- C. Use Cloud Config and Action Trail for compliance and audit
- D. Use CEN for interconnecting different networks globally, use shared VPC to share services between different organizations
- 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 38
A developer has written a web application using a microservice architecture, in such an architecture, the client (web browser or mobile application) first initiates a request. The request first reaches the load balancer, then goes through an authentication service, a billing service, then requests a resource, and finally a result is returned. How many spans does such a call chain consist of?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A
Explanation:
Explanation
1-request, 2-load balancer, 3-authentication service, 4-billing service, 5-resource request
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. If the upload fails due to an accident during the uploading of fragments, you need to upload all the fragments again
- B. 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
- C. Use Multipart Upload to upload multiple parts of a file in parallel to speed up the upload process
- D. Multipart Upload is usually used when the size of the file to be uploaded is large
Answer: B,C,D
NEW QUESTION 40
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Alibaba System Operator Free Certification Exam Material from UpdateDumps with 63 Questions: https://www.updatedumps.com/Alibaba-Cloud/ACA-Operator-updated-exam-dumps.html