Alibaba Cloud ACA-Operator Real Exam Questions Test Engine Dumps Training With 63 Questions
ACA-Operator Actual Questions Answers PDF 100% Cover Real Exam Questions
Alibaba Cloud ACA-Operator Exam Syllabus Topics:
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NEW QUESTION 31
Which database utility is suitable for automate perception, healing, optimization, O&M, and security assurance for databases?
- A. DMS
- B. DTS
- C. DBS
- D. DAS
Answer: D
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/64851.htm
NEW QUESTION 32
Which command is used to get the Docker daemon information?
- A. docker version
- B. docker image
- C. docker pull
- D. docker info
Answer: D
Explanation:
Explanation
https://docs.docker.com/engine/reference/commandline/info/
NEW QUESTION 33
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 ECS was not restarted after being created
- B. The CreateDisk API call was not made
- C. The CreateSecurityGroup 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 34
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 35
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 36
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 37
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 38
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 39
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 40
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 41
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 42
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 43
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. Scheduled message
- B. Batched message
- C. Transactional message
- D. Retried message
- E. Ordered message
Answer: A,C,E
NEW QUESTION 44
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. Event Notifications can cross regions.
- B. Message Service provides synchronous notification to ensure the consistency between the message acknowledgment and event processing.
- C. 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.
- D. The consumer type of the event notification message can be HTTP Server, Queue, or Topic.
Answer: C,D
NEW QUESTION 45
Which of the following options are correct for Multipart Upload and Resumable Upload in Object Storage Service (OSS)? (Number of correct answers: 3)
- A. 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
- B. Use Multipart Upload to upload multiple parts of a file in parallel to speed up the upload process
- C. If the upload fails due to an accident during the uploading of fragments, you need to upload all the fragments again
- D. Multipart Upload is usually used when the size of the file to be uploaded is large
Answer: A,B,D
NEW QUESTION 46
Tracing Analysis is used to analyze and diagnose performance bottlenecks in a distributed application architecture and make microservice development and diagnostics more efficient.
- A. True
- B. False
Answer: A
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/90277.htm
NEW QUESTION 47
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 ECS instances in multiple regions, thereby leveraging automatic high availability across regions
- B. You can use DNS to resolve domain names to the IP addresses of multiple SLB instances running in different regions
- C. You can provision multiple SLB instances in multiple regions, thereby leveraging automatic high availability across regions
- D. You can use DNS to resolve domain names to the IP addresses of multiple ECS instances running in different regions
Answer: B
Explanation:
Explanation
https://cloudacademy.com/course/alibaba-server-load-balancer-1066/alibabas-high-availability/
NEW QUESTION 48
ApsaraDB for HBase is a cost-effective cloud-based intelligent SQL service that is of high scalability and compatible with the open source HBase.
- A. True
- B. False
Answer: B
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/49501.htm
NEW QUESTION 49
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 50
Which Alibaba Cloud service is an automated operations and maintenance (O&M) service to execute O&M tasks?
- A. Operation Orchestration Service (OOS)
- B. Resource Access Management (RAM)
- C. Maintenance Orchestration Service (MOS)
- D. Resource Orchestration Service (ROS)
Answer: A
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/120556.htm
NEW QUESTION 51
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