Master 2021 Latest The Questions Alibaba System Operator and Pass ACA-Operator Real Exam! [Q32-Q54]

Master 2021 Latest The Questions Alibaba System Operator and Pass ACA-Operator  Real Exam!

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NEW QUESTION 32
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. Developers can generate a plaintext data key and a ciphertext data key by calling the GenerateDataKey interface.
• B. 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).
• C. The master key generated by KMS is also kept by the user.
• D. The user uses the master key created on KMS to encrypt and decrypt the generated data key.

Answer: A,B,D

 

NEW QUESTION 33
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 34
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 35
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 36
PolarDB supports three engines: MySQL, PostgreSQL and Oracle.

• A. False
• B. True

Answer: A

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

 

NEW QUESTION 37
Which of the following database connection methods does ApsaraDB for Redis support? (Number of correct answers: 2)

• A. Redis-cli
• B. Sentinel
• C. Aliyun-cli
• D. DMS (Data Management Service)

Answer: A,D

 

NEW QUESTION 38
Alibaba Cloud ActionTrail is a service that monitors and records the actions of your Alibaba Cloud account, including the access to and use of cloud products and services through the Alibaba Cloud console, API operations, and SDKs.

• A. True
• B. False

Answer: A

 

NEW QUESTION 39
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 40
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 41
Which of the following is NOT required for SMC (Server Migration Center) to migrate a server to Alibaba Cloud?

• A. The SMC client transfers the source data to an intermediate ECS instance
• B. From the SMC console, configure the type of disk image to be generated during the migration
• C. The SMC backend service generates a target Alibaba Cloud image based on the migration source
• D. Import the migration source information to the SMC console

Answer: B

Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/127116.htm

 

NEW QUESTION 42
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 43
Which of the following descriptions of the principles of Alibaba Cloud SSL certificate private key protection is correct?

• A. The plaintext of Alibaba Cloud's private key is usually stored on disk and backed up regularly
• B. Alibaba Cloud Certificate Service keys are loaded into memory in plaintext format ONLY when needed.
• C. Alibaba Cloud uses the built-in functionality of the SSL certificate service to encrypt and store the private key to ensure the security of your certificate's private key
• D. Alibaba Cloud Certificate Service uses symmetric encryption to save the certificate private key.

Answer: B

 

NEW QUESTION 44
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 45
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 instance is in the "running" state
• C. The targeted RDS instance is a disaster recovery instance
• D. No instance type (specification) was included in the request parameters

Answer: A,C,D

 

NEW QUESTION 46
Which of the following features are unique to Alibaba Cloud Container Registry, as compared with Docker Hub? (Number of correct answers: 2)

• A. 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.
• B. Container Registry can automatically build new Docker images when source code changes.
• C. You can set your image repository access to public or private.
• D. You can create and delete image repositories in different regions based on your needs.

Answer: A,D

 

NEW QUESTION 47
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 48
RAM supports custom policies.

• A. True
• B. False

Answer: A

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

 

NEW QUESTION 49
________________ 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 50
CloudMonitor is for tracking operations on cloud resources.

• A. False
• B. True

Answer: A

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

 

NEW QUESTION 51
Which database utility is suitable for database migration?

• A. DMS
• B. DBS
• C. DTS
• D. DAS

Answer: C

Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/176063.htm

 

NEW QUESTION 52
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: C

Explanation:
Explanation
1-request, 2-load balancer, 3-authentication service, 4-billing service, 5-resource request

 

NEW QUESTION 53
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 54
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