[Q16-Q39] ACA-Operator Certification - The Ultimate Guide [Updated 2022]

ACA-Operator Certification - The Ultimate Guide [Updated 2022]

ACA-Operator Practice Exam and Study Guides - Verified By RealVCE

NEW QUESTION 16
Which of the following data volume types is not supported by Elastic Container Instance (ECI)?

• A. NFS
• B. FixedVolume
• C. ConfigFile
• D. EmptyDir

Answer: B

Explanation:
Explanation
FlexVolume is the correct one
https://www.alibabacloud.com/help/doc-detail/90672.htm

 

NEW QUESTION 17
Which Alibaba Cloud service is an automated operations and maintenance (O&M) service to execute O&M tasks?

• A. Resource Access Management (RAM)
• B. Maintenance Orchestration Service (MOS)
• C. Operation Orchestration Service (OOS)
• D. Resource Orchestration Service (ROS)

Answer: C

Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/120556.htm

 

NEW QUESTION 18
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 19
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. Synchronization mode
• B. Asynchronous mode
• C. Request response mode
• D. Waiting for callback mode

Answer: B

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 20
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. visitor's real IP address is stored in the "X-Forwarded-For" HTTP header. It can be directly obtained via Apache or NGINX logs.
• C. visitor's real IP address can only be obtained by modifying the site or web application.
• D. In Windows, if IIS is used, after installing the "F5XForwardedFor" extension module, the visitor's real IP address can be seen via IIS logs.

Answer: B,D

 

NEW QUESTION 21
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 not forwarded to the ECS instances and you get back a 400 error
• B. Requests are not forwarded to the ECS instances and you get back a 500 error
• C. Requests are forwarded to other normal ECS instances. When the faulty ECS instance becomes normal, SLB forwards requests to the ECS instance again
• D. Requests are forwarded to other normal ECS instances and the unhealthy ECS instance is shutted down

Answer: C

Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/27702.htm

 

NEW QUESTION 22
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 23
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 24
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 25
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 26
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 27
Which of the following methods can NOT be used for operating Alibaba Cloud Elastic Compute Service (ECS) instances?

• A. SDK
• B. Console
• C. CLI
• D. CloudFormation

Answer: D

Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/25422.htm

 

NEW QUESTION 28
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 29
Which Alibaba Cloud service is used to manage cloud computing resources including the deployment?

• A. Resource Orchestration Service (ROS)
• B. Operation Orchestration Service (OOS)
• C. Resource Access Management (RAM)
• D. Maintenance Orchestration Service (MOS)

Answer: A

Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/28852.htm

 

NEW QUESTION 30
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. Applies indices to fields to contain many records.
• B. Adhere to the rightmost prefix principle when using composite indexes
• C. Apply indexing to fields of fixed length (preferably not long fields).
• D. Add an index to a field that is frequently queried but does not frequently perform add, delete, or modify operations.
• E. A table should not contaiiAiore than 6 indexed fields.

Answer: C,D,E

 

NEW QUESTION 31
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 32
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 33
Which of the following descriptions of the principles of Alibaba Cloud SSL certificate private key protection is correct?

• A. 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
• B. Alibaba Cloud Certificate Service keys are loaded into memory in plaintext format ONLY when needed.
• C. The plaintext of Alibaba Cloud's private key is usually stored on disk and backed up regularly
• D. Alibaba Cloud Certificate Service uses symmetric encryption to save the certificate private key.

Answer: B

 

NEW QUESTION 34
Which of the following steps is NOT mandatory when creating an API through Alibaba Cloud API Gateway?

• A. Define the API backend service
• B. Define basic API information
• C. Define API Request parameters
• D. Attach a domain name

Answer: D

Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/29478.htm

 

NEW QUESTION 35
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 36
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 37
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. Resource Group
• B. Cloud Configo
• C. ActionTrail
• D. CloudMonitor

Answer: C

Explanation:
Explanation
https://www.alibabacloud.com/help/doc-detail/28804.htm

 

NEW QUESTION 38
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 39
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