A fully updated 2021 ACA-Operator Exam Dumps exam guide from training expert Exam4Free
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NEW QUESTION 29
RAM supports custom policies.
- A. True
- B. False
Answer: A
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/93733.htm
NEW QUESTION 30
You need to log all actions taken by users of your Alibaba Cloud account, whether via the command line tools or the web console. Which Alibaba Cloud product can you use to create a log of user operations?
- A. CloudMonitor
- B. Cloud Configo
- C. ActionTrail
- D. Resource Group
Answer: C
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/28804.htm
NEW QUESTION 31
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 32
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 33
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 34
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 SLB instances in multiple regions, thereby leveraging automatic high availability across regions
- B. You can provision multiple ECS instances in multiple regions, thereby leveraging automatic high availability across regions
- C. You can use DNS to resolve domain names to the IP addresses of multiple SLB instances running in different regions
- D. You can use DNS to resolve domain names to the IP addresses of multiple ECS instances running in different regions
Answer: C
Explanation:
Explanation
https://cloudacademy.com/course/alibaba-server-load-balancer-1066/alibabas-high-availability/
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
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 37
Which of the following options correctly describes CloudMonitor Custom Monitoring and Custom Events?
(Number of correct answers: 2)
- A. Custom Monitoring is used for collection of non-continuous event data, such as information about ECS instance restarts
- B. Custom Events is for periodic and continuous collection of time series monitoring data, queries, and alarms
- C. Custom Monitoring is used for periodic and continuous collection of time series monitoring data, queries, and alarms
- D. Custom Events is used for collection of continuous event type data, queries, and alarms
Answer: C,D
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/35170.htm
NEW QUESTION 38
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 39
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 40
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 41
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 42
Which of the following Alibaba Cloud services offers a software-defined wide area network (SD-WAN) solution based on cloud-native technologies?
- A. VPN Gateway
- B. Smart Access Gateway (SAG)
- C. NAT Gateway
- D. Content Delivery Network (CDN)
Answer: B
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/69227.htm
NEW QUESTION 43
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 44
Which of the following data volume types is not supported by Elastic Container Instance (ECI)?
- A. NFS
- B. FixedVolume
- C. EmptyDir
- D. ConfigFile
Answer: B
Explanation:
Explanation
FlexVolume is the correct one
https://www.alibabacloud.com/help/doc-detail/90672.htm
NEW QUESTION 45
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 46
Which of the following options are correct for Multipart Upload and Resumable Upload in Object Storage Service (OSS)? (Number of correct answers: 3)
- A. Use Multipart Upload to upload multiple parts of a file in parallel to speed up the upload process
- B. Multipart Upload is usually used when the size of the file to be uploaded is large
- C. If the upload fails due to an accident during the uploading of fragments, you need to upload all the fragments again
- D. 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
Answer: A,B,D
NEW QUESTION 47
Which of these metrics are collected by CloudMonitor's Host Monitoring function? (Number of correct answers: 3)
- A. ECS network I/O
- B. Running processes on the ECS instance
- C. Storage space used by OSS buckets
- D. CPU status of the ECS instance
Answer: A,B,D
Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/35170.htm
NEW QUESTION 48
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. Apply indexing to fields of fixed length (preferably not long fields).
- B. Adhere to the rightmost prefix principle when using composite indexes
- C. Add an index to a field that is frequently queried but does not frequently perform add, delete, or modify operations.
- D. Applies indices to fields to contain many records.
- E. A table should not contaiiAiore than 6 indexed fields.
Answer: A,C,E
NEW QUESTION 49
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