[Sep 19, 2021] ACA-Operator Dumps Full Questions - Exam Study Guide
Alibaba System Operator Free Certification Exam Material from Pass4suresVCE with 63 Questions
NEW QUESTION 35
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 36
How does Cloud Config get permission to gather information about other Alibaba Cloud services?
- A. It gets automatic permission to access everything, because it is an Alibaba Cloud service
- B. By storing a copy of your password
- C. An Access Key
- D. A RAM Role
Answer: D
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/156642.htm
NEW QUESTION 37
You can create an event notification rule in Message Service and push notifications to the specified consumer in the form of messages, to receive events from specified Alibaba Cloud resources. Which of the following options are correct statements about the Message Service (MS) service? (Number of correct answers: 2)
- A. Message Service provides synchronous notification to ensure the consistency between the message acknowledgment and event processing.
- B. The consumer type of the event notification message can be HTTP Server, Queue, or Topic.
- C. Event Notifications can cross regions.
- D. The event notification message is retained within the valid time. When you fail to receive an event message, the event notification message is retained based on the specified retry policy.
Answer: B,D
NEW QUESTION 38
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 39
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 40
Which of these log formats is currently supported by Alibaba Cloud's ActionTrail?
- A. HTML
- B. JSON
- C. XML
- D. Markdown
Answer: B
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/140850.htm
NEW QUESTION 41
RAM supports custom policies.
- A. True
- B. False
Answer: A
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/93733.htm
NEW QUESTION 42
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 43
Which of these are important concepts in Terraform's configuration language, HCL? (Number of correct answers: 3)
- A. Service Mesh
- B. Variable
- C. Resource
- D. Provider
Answer: B,C,D
NEW QUESTION 44
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 45
A system operator can tag resources for costing and billing purposes.
- A. True
- B. False
Answer: A
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/25477.htm
NEW QUESTION 46
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 47
________________ 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 48
Which of these services can be used to monitor Alibaba Cloud resources and send alerts? (Number of correct answers: 3)
- A. Cloud Config
- B. CloudMonitor
- C. Object Storage Service (OSS)
- D. ActionTrail
Answer: A,B,D
Explanation:
Explanation
OSS is an object storage service.
NEW QUESTION 49
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 50
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 51
Which Alibaba Cloud service is an automated operations and maintenance (O&M) service to execute O&M tasks?
- A. Resource Orchestration Service (ROS)
- B. Resource Access Management (RAM)
- C. Maintenance Orchestration Service (MOS)
- D. Operation Orchestration Service (OOS)
Answer: D
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/120556.htm
NEW QUESTION 52
Alibaba Cloud RocketMQ is typically used in scenarios where message publishing and consumption performance requirements are high. Which of the following are supported message types in Alibaba Cloud RocketMQ? (Number of correct answers: 3)
- A. Batched message
- B. Scheduled message
- C. Retried message
- D. Ordered message
- E. Transactional message
Answer: B,D,E
NEW QUESTION 53
Which of the following steps is NOT mandatory when creating an API through Alibaba Cloud API Gateway?
- A. Attach a domain name
- B. Define API Request parameters
- C. Define basic API information
- D. Define the API backend service
Answer: A
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/29478.htm
NEW QUESTION 54
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 55
Which command is used to get the Docker daemon information?
- A. docker pull
- B. docker info
- C. docker version
- D. docker image
Answer: B
Explanation:
Explanation
https://docs.docker.com/engine/reference/commandline/info/
NEW QUESTION 56
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 57
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. Enable "Hotlink protection" of OSS and use an HTTP Referer whitelist to prevent unauthorized users from accessing your data
- B. Use SLB for extra protection
- C. Change the website access mode to HTTPS
- D. Migrate music files from the OSS to the data disks for ECS instances
Answer: B
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 58
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 59
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. Store the files in the /tmp directory on a temporary ECS instance, and delete the files at when the Function Compute function call completes.
- B. Store the files in Cloud Disk and delete the files when Function Compute function call completes.
- C. Copy the files to an OSS bucket with a lifecycle policy configured to delete the files automatically.
- D. Copy the files to NFS and delete the files when the Function Compute function call completes.
Answer: C
NEW QUESTION 60
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