Score Higher on Verified ACA-Cloud1 | ACA Cloud Computing Associate Exam Questions with Answers

 B is the correct answer because Auto Scaling can automatically remove unhealthy ECS instances from the scaling group, and also automatically add equivalent amount of new ECS instances back to the scaling group. This feature is called Elastic Self-Health, and it can improve the availability and reliability of the scaling group. Elastic Self-Health can be enabled or disabled in the scaling group settings. When Elastic Self-Health is enabled, Auto Scaling monitors the health status of the ECS instances in the scaling group based on the health check results of the Server Load Balancer (SLB) instances that are associated with the scaling group. If an ECS instance is detected as unhealthy by SLB for a specified period of time, Auto Scaling removes the unhealthy ECS instance from the scaling group and releases it. Then, Auto Scaling triggers a scale-out event to add a new ECS instance to the scaling group to maintain the desired capacity12 References: 1: Elastic Self-Health 2: Enable or disable Elastic Self-Health

Alibaba Cloud Monitor service is a service that monitors the running status of Alibaba Cloud resources and custom metrics, and provides alert notifications and data visualization features. A user receives an alert saying that the IOPS utilization rate for an ECS instance exceeds 80%, which means that the disk performance of the instance is reaching its limit and may affect the application performance. To handle the situation, the user may obtain help from Alibaba Cloud through the following methods:

• Check ECS or CloudMonitor product documents: The user can check the official documentation of ECS or CloudMonitor to learn more about the concepts, features, operations, and best practices of these services. For example, the user can find the information about how to view the IOPS utilization rate of an ECS instance, how to optimize the disk performance of an ECS instance, and how to configure alert rules for CloudMonitor.
• Open a ticket to Alibaba Cloud help desk: The user can open a ticket to Alibaba Cloud help desk to get technical support from Alibaba Cloud engineers. The user can choose the ticket type, severity, and product, and describe the problem in detail. The user can also attach screenshots or logs to the ticket to help the engineers diagnose the problem. The user can track the status and response of the ticket in the console.
• Look for answers in Alibaba Cloud forum: The user can look for answers in Alibaba Cloud forum, which is a platform where Alibaba Cloud users can share their experiences, ask questions, and discuss topics related to Alibaba Cloud products and services. The user can search for relevant keywords or tags, browse the existing threads, or post a new question in the forum. The user can also interact with other users or Alibaba Cloud experts in the forum.

D. You cannot obtain any help from Alibaba Cloud is not a correct answer, as Alibaba Cloud provides various ways to help its users with their problems and questions. References: : [What is CloudMonitor? - CloudMonitor - Alibaba Cloud Documentation Center]. : [View the IOPS utilization of an ECS instance - CloudMonitor - Alibaba Cloud Documentation Center]. : [Optimize the disk performance of an ECS instance - Elastic Compute Service - Alibaba Cloud Documentation Center]. : [Configure alert rules - CloudMonitor - Alibaba Cloud Documentation Center].

 According to the Alibaba Cloud Academy, business record filing is a process of registering your website information with the provincial communication management bureau where your server is located. The approval requirements for business record filing vary depending on provincial communication management bureaus. Some provinces may require additional materials or procedures for business record filing. Therefore, the statement is true. References: ACA Cloud Computing Exam Preparation Course - Alibaba Cloud, Module 2: Cloud Computing Security, Lesson 2: Business Record Filing, Slide 3.