Best Quality Alibaba Cloud ACA-Operator Exam Questions Prep4sureGuide Realistic Practice Exams [2021]
Critical Information To ACA System Operator Certification Pass the First Time
NEW QUESTION 18
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 19
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 20
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 21
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 22
Which of the following statements about ECS Snapshot is NOT correct?
- A. You can roll back a disk by using a snapshot
- B. You can create an ECS instance from a snapshot
- C. You can manually create snapshots
- D. You can create automatic snapshots
Answer: B
Explanation:
Explanation
You can create a custom image from a snapshot that contains the operating system and data of an ECS instance. Then, you can use the custom image to create multiple instances that have identical application environments.
https://www.alibabacloud.com/help/doc-detail/25391.htm
NEW QUESTION 23
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 24
Which of the following methods can NOT be used for operating Alibaba Cloud Elastic Compute Service (ECS) instances?
- A. CLI
- B. CloudFormation
- C. Console
- D. SDK
Answer: B
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/25422.htm
NEW QUESTION 25
Which of these Alibaba Cloud services are used for security (either credentials management, logging, or auditing?) (Number of correct answers: 3)
- A. Key Management Service (KMS)
- B. Log Service
- C. ActionTrail
- D. Table store
Answer: A,B,C
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/27280.htm
NEW QUESTION 26
Your company decided to replicate the whole cloud environment in another region and use it as a cross-region failover in disaster recovery scenarios.
Your current environment includes Elastic Compute Service (ECS) instances, Server Load Balancer (SLB) instances and Relational Database Service (RDS) instances. Which of the following statements is correct?
- A. You can provision multiple SLB instances in multiple regions, thereby leveraging automatic high availability across regions
- B. You can provision multiple ECS instances in multiple regions, thereby leveraging automatic high availability across regions
- C. You can use DNS to resolve domain names to the IP addresses of multiple SLB instances running in different regions
- D. You can use DNS to resolve domain names to the IP addresses of multiple ECS instances running in different regions
Answer: C
Explanation:
Explanation
https://cloudacademy.com/course/alibaba-server-load-balancer-1066/alibabas-high-availability/
NEW QUESTION 27
Which of the following services is used to establish private network connections between virtual private clouds (VPCs) in different regions, or between VPCs and data centers?
- A. VPN Gateway
- B. CEN (Cloud Enterprise Network)
- C. Express Connect
- D. NAT Gateway
Answer: B
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/59870.htm
NEW QUESTION 28
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 29
Alibaba Cloud Log Service allows you to store and search logs from a variety of sources, but has no built-in visualization capabilities.
- A. False
- B. True
Answer: A
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/102530.htm
NEW QUESTION 30
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. Before triggering the alarm task, the number of instances in the group has reached the maximum number of instances allowed (MaxSize)
- B. The number of instances in the current group exceeds the "expected number of instances" for the Scaling Group
- C. The ECS instances in the Scaling Group have not yet installed the CloudMonitor monitoring agent
- 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,C,D
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/74853.htm
NEW QUESTION 31
Which configuration language does Terraform support?
- A. YAML
- B. HCL
- C. XML
- D. Python
Answer: B
Explanation:
Explanation
https://www.terraform.io/docs/language/syntax/configuration.html
NEW QUESTION 32
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 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. 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 34
Which of the following descriptions describes the (Security Token Service) STS service correctly? (Number of correct answers: 3)
- A. Through the STS service, RAM users or RAM roles can obtain a temporary token that allows them to call the Alibaba Cloud API or use the web console
- B. The STS service supports the use of both HTTP and HTTPS protocols
- C. When calling the STS API, in order to ensure the safe calling of the API, Alibaba Cloud will authenticate each API request through a signature when each API call is made
- D. A STS request consists of an access address, communication protocol, request method, request parameters and character encoding
Answer: A,C,D
NEW QUESTION 35
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