[Nov-2021] ACA-Operator Exam Dumps, ACA-Operator Practice Test Questions
Attested ACA-Operator Dumps PDF Resource [2021]
Alibaba Cloud ACA-Operator Exam Syllabus Topics:
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NEW QUESTION 24
CloudMonitor is for tracking operations on cloud resources.
- A. True
- B. False
Answer: B
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/35170.htm
NEW QUESTION 25
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 26
Which of these is NOT a function of CloudMonitor?
- A. Set alarm rules for any of CloudMonitor's metrics
- B. Automatically take remedial action when an alarm triggers
- C. Set the alarm rule effective period (the time during which the alarm may trigger)
- D. Set notification methods for different alarms
Answer: B
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/35170.htm
NEW QUESTION 27
Which of the following options are correct for Multipart Upload and Resumable Upload in Object Storage Service (OSS)? (Number of correct answers: 3)
- A. If the upload fails due to an accident during the uploading of fragments, you need to upload all the fragments again
- B. 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
- C. Use Multipart Upload to upload multiple parts of a file in parallel to speed up the upload process
- D. Multipart Upload is usually used when the size of the file to be uploaded is large
Answer: B,C,D
NEW QUESTION 28
Which of these metrics are collected by CloudMonitor's Host Monitoring function? (Number of correct answers: 3)
- A. Storage space used by OSS buckets
- B. CPU status of the ECS instance
- C. Running processes on the ECS instance
- D. ECS network I/O
Answer: B,C,D
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/35170.htm
NEW QUESTION 29
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 30
Which of the following Alibaba Cloud services offers a software-defined wide area network (SD-WAN) solution based on cloud-native technologies?
- A. NAT Gateway
- B. VPN Gateway
- C. Smart Access Gateway (SAG)
- D. Content Delivery Network (CDN)
Answer: C
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/69227.htm
NEW QUESTION 31
PolarDB supports three engines: MySQL, PostgreSQL and Oracle.
- A. True
- B. False
Answer: B
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/58764.htm
NEW QUESTION 32
Which database utility is suitable for database migration?
- A. DAS
- B. DMS
- C. DTS
- D. DBS
Answer: C
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/176063.htm
NEW QUESTION 33
Which of the following services is used to establish private network connections between virtual private clouds (VPCs) in different regions, or between VPCs and data centers?
- A. NAT Gateway
- B. VPN Gateway
- C. Express Connect
- D. CEN (Cloud Enterprise Network)
Answer: D
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/59870.htm
NEW QUESTION 34
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 developer did not call AllocatePublicIpAdress (an additional API call), which is needed to assign a public IP
- D. The CreateSecurityGroup API call was not made
Answer: C
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/25544.htm
NEW QUESTION 35
Which of the following descriptions describes the (Security Token Service) STS service correctly? (Number of correct answers: 3)
- A. 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
- B. The STS service supports the use of both HTTP and HTTPS protocols
- C. 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
- D. A STS request consists of an access address, communication protocol, request method, request parameters and character encoding
Answer: A,C,D
NEW QUESTION 36
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 NFS and delete the files 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. 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. Copy the files to an OSS bucket with a lifecycle policy configured to delete the files automatically.
Answer: D
NEW QUESTION 37
Which of the following statements about ECS Snapshot is NOT correct?
- A. You can roll back a disk by using a snapshot
- B. You can manually create snapshots
- C. You can create an ECS instance from a snapshot
- D. You can create automatic snapshots
Answer: C
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 38
Which configuration language does Terraform support?
- A. XML
- B. YAML
- C. Python
- D. HCL
Answer: D
Explanation:
Explanation
https://www.terraform.io/docs/language/syntax/configuration.html
NEW QUESTION 39
Which of these Alibaba Cloud services are used for security (either credentials management, logging, or auditing?) (Number of correct answers: 3)
- A. Table store
- B. ActionTrail
- C. Key Management Service (KMS)
- D. Log Service
Answer: B,C,D
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/27280.htm
NEW QUESTION 40
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. From the SMC console, configure the type of disk image to be generated during the migration
- C. The SMC client transfers the source data to an intermediate ECS instance
- D. The SMC backend service generates a target Alibaba Cloud image based on the migration source
Answer: B
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/127116.htm
NEW QUESTION 41
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. ActionTrail
- D. Object Storage Service (OSS)
Answer: A,B,C
Explanation:
Explanation
OSS is an object storage service.
NEW QUESTION 42
Which command is used to get the Docker daemon information?
- A. docker image
- B. docker pull
- C. docker info
- D. docker version
Answer: C
Explanation:
Explanation
https://docs.docker.com/engine/reference/commandline/info/
NEW QUESTION 43
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. The ECS instances in the Scaling Group have not yet installed the CloudMonitor monitoring agent
- B. Before triggering the alarm task, the number of instances in the group has reached the maximum number of instances allowed (MaxSize)
- C. The number of instances in the current group exceeds the "expected number of instances" for the Scaling Group
- 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,B,D
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/74853.htm
NEW QUESTION 44
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 45
Which of the following options correctly describes CloudMonitor Custom Monitoring and Custom Events?
(Number of correct answers: 2)
- A. Custom Monitoring is used for periodic and continuous collection of time series monitoring data, queries, and alarms
- B. Custom Events is for periodic and continuous collection of time series monitoring data, queries, and alarms
- C. Custom Monitoring is used for collection of non-continuous event data, such as information about ECS instance restarts
- D. Custom Events is used for collection of continuous event type data, queries, and alarms
Answer: A,D
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/35170.htm
NEW QUESTION 46
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. Use role-based SSO for Identities access, use resource directory to manage the resources in shared service account and master account
- B. Stop using Action Trail and Cloud Config to save the storage cost
- C. Use Cloud Config and Action Trail for compliance and audit
- D. Use CEN for interconnecting different networks globally, use shared VPC to share services between different organizations
- E. Use one single VPC for all the resources to have the best performance
Answer: A,C,D
Explanation:
Explanation
https://www.alibabacloud.com/solutions/it-governance
NEW QUESTION 47
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. Resource Access Management (RAM)
- C. Auto Scaling
- D. Server Load Balancer (SLB)
Answer: A
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/25857.htm
NEW QUESTION 48
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. Use SLB for extra protection
- B. Migrate music files from the OSS to the data disks for ECS instances
- C. Change the website access mode to HTTPS
- D. Enable "Hotlink protection" of OSS and use an HTTP Referer whitelist to prevent unauthorized users from accessing your data
Answer: A
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 49
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