2021 Latest 100% Exam Passing Ratio - ACA-Operator Dumps PDF
Pass Exam With Full Sureness - ACA-Operator Dumps with 63 Questions
Alibaba Cloud ACA-Operator Exam Syllabus Topics:
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NEW QUESTION 22
Which of the following descriptions describes the (Security Token Service) STS service correctly? (Number of correct answers: 3)
- A. A STS request consists of an access address, communication protocol, request method, request parameters and character encoding
- B. 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
- C. The STS service supports the use of both HTTP and HTTPS protocols
- D. 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
Answer: A,B,D
NEW QUESTION 23
Which of the following is NOT required for SMC (Server Migration Center) to migrate a server to Alibaba Cloud?
- A. Import the migration source information to the SMC console
- B. The SMC backend service generates a target Alibaba Cloud image based on the migration source
- C. From the SMC console, configure the type of disk image to be generated during the migration
- D. The SMC client transfers the source data to an intermediate ECS instance
Answer: C
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/127116.htm
NEW QUESTION 24
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 25
Resource Management provides a collection of resource management services that support enterprise IT administration.
- A. True
- B. False
Answer: A
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/94475.htm
NEW QUESTION 26
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. Stop using Action Trail and Cloud Config to save the storage cost
- B. Use Cloud Config and Action Trail for compliance and audit
- C. Use one single VPC for all the resources to have the best performance
- D. Use role-based SSO for Identities access, use resource directory to manage the resources in shared service account and master account
- E. Use CEN for interconnecting different networks globally, use shared VPC to share services between different organizations
Answer: B,D,E
Explanation:
Explanation
https://www.alibabacloud.com/solutions/it-governance
NEW QUESTION 27
Which of the following fields should be defined in the Alibaba Cloud Terraform Provider Configuration? (Number of correct answers: 3)
- A. region
- B. ecret_key
- C. access_key
- D. image_id
Answer: A,B,C
Explanation:
Explanation
https://www.terraform.io/docs/language/providers/requirements.html
NEW QUESTION 28
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 29
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. When the faulty ECS instance becomes normal, SLB forwards requests to the ECS instance again
- B. Requests are not forwarded to the ECS instances and you get back a 400 error
- C. Requests are forwarded to other normal ECS instances and the unhealthy ECS instance is shutted down
- D. Requests are not forwarded to the ECS instances and you get back a 500 error
Answer: A
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/27702.htm
NEW QUESTION 30
A Developer is creating a Function Compute function. This function requires around 1 GB of temporary storage for files while executing. These files will not be needed after the function is completed for a fixed period. How can this developer MOST efficiently handle the temporary files?
- A. Copy the files to an OSS bucket with a lifecycle policy configured to delete the files automatically.
- B. Copy the files to NFS and delete the files when the Function Compute function call completes.
- C. Store the files in the /tmp directory on a temporary ECS instance, and delete the files at when the Function Compute function call completes.
- D. Store the files in Cloud Disk and delete the files when Function Compute function call completes.
Answer: A
NEW QUESTION 31
When you use SQL statements to access tables in a database without an index configured, a full table scan will be performed. If a table contains a large amount of data, this kind of scan will access a large amount of data and consume a lot of the database's resources. Which of the following options are best practices when creating database indexes? (Number of correct answers: 3)
- A. Adhere to the rightmost prefix principle when using composite indexes
- B. Apply indexing to fields of fixed length (preferably not long fields).
- C. Applies indices to fields to contain many records.
- D. A table should not contaiiAiore than 6 indexed fields.
- E. Add an index to a field that is frequently queried but does not frequently perform add, delete, or modify operations.
Answer: B,D,E
NEW QUESTION 32
When using Alibaba Cloud CDN, a visitor's request will first be routed to a CDN edge node, and in the event of a cache miss at this edge node, the node will fetch data from the origin site (back-to-source request). Even with this redirection, it is possible for the origin site to see the visitor's real IP address. Which of the following statements about obtaining the visitor's real IP address are correct? (Number of correct answers: 2)
- A. You can activate the "record visitor's real IP" function in the Alibaba Cloud CDN console, then you can directly view visitor's IP addresses from the Alibaba Cloud CDN access logs.
- B. In Windows, if IIS is used, after installing the "F5XForwardedFor" extension module, the visitor's real IP address can be seen via IIS logs.
- C. visitor's real IP address can only be obtained by modifying the site or web application.
- D. visitor's real IP address is stored in the "X-Forwarded-For" HTTP header. It can be directly obtained via Apache or NGINX logs.
Answer: B,D
NEW QUESTION 33
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. Quickly build a personal, learning, or test environment
- B. Quickly build a personal blog website
- C. Set up a NoSQL database service
- D. Quickly build a small e-commerce website
- E. Quickly build serverless site using Function Compute
Answer: A,B,D
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/58620.htm
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. 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 35
Which configuration language does Terraform support?
- A. HCL
- B. YAML
- C. Python
- D. XML
Answer: A
Explanation:
Explanation
https://www.terraform.io/docs/language/syntax/configuration.html
NEW QUESTION 36
Which of the following descriptions of the principles of Alibaba Cloud SSL certificate private key protection is correct?
- A. Alibaba Cloud Certificate Service keys are loaded into memory in plaintext format ONLY when needed.
- B. Alibaba Cloud Certificate Service uses symmetric encryption to save the certificate private key.
- C. The plaintext of Alibaba Cloud's private key is usually stored on disk and backed up regularly
- D. 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
Answer: A
NEW QUESTION 37
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. Object Storage Service (OSS)
- D. ActionTrail
Answer: A,B,D
Explanation:
Explanation
OSS is an object storage service.
NEW QUESTION 38
Which Alibaba Cloud service is used to manage cloud computing resources including the deployment?
- A. Resource Access Management (RAM)
- B. Maintenance Orchestration Service (MOS)
- C. Operation Orchestration Service (OOS)
- D. Resource Orchestration Service (ROS)
Answer: D
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/28852.htm
NEW QUESTION 39
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 40
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 41
Which of the following options correctly describes CloudMonitor Custom Monitoring and Custom Events?
(Number of correct answers: 2)
- A. Custom Events is for periodic and continuous collection of time series monitoring data, queries, and alarms
- B. Custom Monitoring is used for periodic and continuous collection of time series monitoring data, queries, and alarms
- C. Custom Events is used for collection of continuous event type data, queries, and alarms
- D. Custom Monitoring is used for collection of non-continuous event data, such as information about ECS instance restarts
Answer: B,C
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/35170.htm
NEW QUESTION 42
Which of these are important concepts in Terraform's configuration language, HCL? (Number of correct answers: 3)
- A. Service Mesh
- B. Resource
- C. Provider
- D. Variable
Answer: B,C,D
NEW QUESTION 43
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 44
________________ is a fully-managed event-driven computing service that allows you to run code in an elastic and reliable way?
- A. Batch Compute
- B. Function Compute
- C. Serverless Workflow
- D. Elastic Compute Service (ECS)
Answer: B
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/52895.htm
NEW QUESTION 45
Which of the following database connection methods does ApsaraDB for Redis support? (Number of correct answers: 2)
- A. Redis-cli
- B. DMS (Data Management Service)
- C. Sentinel
- D. Aliyun-cli
Answer: A,B
NEW QUESTION 46
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