[2021] ACA-Operator by Alibaba System Operator Actual Free Exam Practice Test [Q13-Q29]

[2021]  ACA-Operator by Alibaba System Operator Actual Free Exam Practice Test

Free Alibaba System Operator ACA-Operator Exam Question

NEW QUESTION 13
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. Asynchronous mode
• B. Waiting for callback mode
• C. Request response mode
• D. Synchronization mode

Answer: A

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 14
Which database utility is suitable for managing databases in a centralized manner?

• A. DMS
• B. DTS
• C. DBS
• D. DAS

Answer: A

Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/47550.htm

 

NEW QUESTION 15
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. Create a single web application and upload the corresponding code package via the Function Compute console (or fcli)
• B. Manually install the Node.js in the Function Compute console
• C. Configure program startup commands and access ports in the Function Compute console
• D. Start and verify the application in the Function Compute console

Answer: B

Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/73329.htm

 

NEW QUESTION 16
Which of the following methods can NOT be used for operating Alibaba Cloud Elastic Compute Service (ECS) instances?

• A. CLI
• B. SDK
• C. Console
• D. CloudFormation

Answer: D

Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/25422.htm

 

NEW QUESTION 17
A developer needs to use some sensitive business data and operational data in the process of developing a program, but the data should be protected (encrypted or anonymized) as much as possible. In order to facilitate and secure management of data encryption keys, the developer can use Alibaba Cloud Key Management Service (KMS) envelope encryption technology. Which of these statements is NOT correct, regarding KMS?

• A. Envelope encryption is an encryption mechanism similar to digital envelope technology. The technology allows you to store, transfer and use encrypted data by encapsulating their Data Keys (DKs) in an envelope, instead of \y encrypting/decrypting data directly with Customer Master Keys (CMKs).
• B. The master key generated by KMS is also kept by the user.
• C. Developers can generate a plaintext data key and a ciphertext data key by calling the GenerateDataKey interface.
• D. The user uses the master key created on KMS to encrypt and decrypt the generated data key.

Answer: A,C,D

 

NEW QUESTION 18
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. Server Load Balancer (SLB)
• B. Auto Scaling
• C. Resource Access Management (RAM)
• D. Resource Orchestration Service (ROS)

Answer: D

Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/25857.htm

 

NEW QUESTION 19
Which of the following statements about ECS Snapshot is NOT correct?

• 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

Answer: D

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 20
How does Cloud Config get permission to gather information about other Alibaba Cloud services?

• A. An Access Key
• B. It gets automatic permission to access everything, because it is an Alibaba Cloud service
• C. By storing a copy of your password
• D. A RAM Role

Answer: D

Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/156642.htm

 

NEW QUESTION 21
Which of these is NOT a function of CloudMonitor?

• A. Automatically take remedial action when an alarm triggers
• B. Set alarm rules for any of CloudMonitor's metrics
• C. Set notification methods for different alarms
• D. Set the alarm rule effective period (the time during which the alarm may trigger)

Answer: A

Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/35170.htm

 

NEW QUESTION 22
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 23
Which command should you run to create the resources described in the Terraform scripts?

• A. terraform plan
• B. terraform init
• C. terraform destroy
• D. terraform apply

Answer: D

Explanation:
Explanation
https://www.terraform.io/docs/cli/commands/apply.html

 

NEW QUESTION 24
You need to log all actions taken by users of your Alibaba Cloud account, whether via the command line tools or the web console. Which Alibaba Cloud product can you use to create a log of user operations?

• A. Cloud Configo
• B. CloudMonitor
• C. Resource Group
• D. ActionTrail

Answer: D

Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/28804.htm

 

NEW QUESTION 25
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. Server internal error
• B. The requested digital signature does not match
• C. The log project (Project) does not exist
• D. Server is busy: please try later

Answer: C

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 26
A developer is making the ModifyDBInstanceSpec API call to change the specifications of an RDS instance, but the operation fails. Why could this be? (Number of correct answers: 3)

• A. The instance has a backup task being executed
• B. The targeted RDS instance is a disaster recovery instance
• C. No instance type (specification) was included in the request parameters
• D. The instance is in the "running" state

Answer: A,B,C

 

NEW QUESTION 27
RAM supports custom policies.

• A. True
• B. False

Answer: A

Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/93733.htm

 

NEW QUESTION 28
Which of the following engines is NOT supported by PolarDB?

• A. MySQLo
• B. MongoDB
• C. PostgreSQL
• D. Oracle

Answer: B

Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/58764.htm

 

NEW QUESTION 29
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Alibaba Cloud ACA-Operator Exam Syllabus Topics:

Topic	Details
Topic 1	Manage permissions for an enterprise organization on the cloud Recognize and differentiate highly available and resilient architectures on Alibaba Cloud
Topic 2	Use Cloud Monitor to monitor application resource usage and health status Cloud Architecture- High Availability and Fault Tolerance
Topic 3	Network design for resource sharing between different accounts Use Cloud Config to track resource configuration changes and evaluate configuration compliance
Topic 4	Deploy and configure ECS on Alibaba Cloud, Set up remote access to ECS Apply Alibaba Cloud Networking Features
Topic 5	Use Alibaba Cloud services and features to manage and assess resource utilization Implement scalability and elasticity based on a given use case using Auto-Scaling and Load Balancer
Topic 6	Migrate data from a local environment to OSS or RDS using DTS or OSS utilities Implement data backup, archiving and retention for Cloud Disk, RDS, and OSS
Topic 7	Create an ECS image to package the application and runtime environments for easy distribution Gather and interpret relevant information for network troubleshooting
Topic 8	Manage identity and authentication for an organization’s users, across multiple platforms Publish container images to Alibaba Cloud Container Registry (ACR)
Topic 9	Implement connectivity to build a full-mesh global network on cloud Create container images for lightweight application packaging using Docker
Topic 10	Identify and implement data protection, encryption, and capacity planning needs Enable finance to see what is being spent, when, and by whom

 

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