Exam AWS Certified Cloud Practitioner topic 1 question 212 discussion

Amazon CloudWatch alarms can be created on the Auto Scaling group as a whole, such as Average CPUUtilization. This is because alarms are used to tell Auto Scaling when to add/remove instances and such decisions would be based upon the group as a whole.

Amazon CloudWatch provides monitoring and observability services for AWS resources, including EC2 instances. It allows you to set up alarms on various metrics, such as CPU utilization, network traffic, or disk usage. When a specific threshold is breached, an alarm is triggered. With Amazon EC2 Auto Scaling, you can configure scaling policies based on CloudWatch alarms. In this scenario, you can set a CloudWatch alarm to monitor CPU utilization of the EC2 instances. When the CPU utilization exceeds a certain threshold, the alarm triggers an auto scaling action to add more instances to handle the increased load. Similarly, when the CPU utilization decreases, the auto scaling action can remove instances to optimize costs.

I think it's C: AWS Systems Manager gives you visibility and control of your infrastructure on AWS. Systems Manager provides a unified user interface so you can view operational data from multiple AWS services and allows you to automate operational tasks across your AWS resources.

https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/AlarmThatSendsEmail.html#alarms-and-missing-data

CloudWatch alarms the Auto Scaling Group by monitoring it SNS only notifies the group

D for sure.

https://docs.aws.amazon.com/autoscaling/ec2/userguide/as-scale-based-on-demand.html "Amazon EC2 Auto Scaling supports the following types of dynamic scaling policies: Target tracking scaling—Increase and decrease the current capacity of the group based on a Amazon CloudWatch metric and a target value. It works similar to the way that your thermostat maintains the temperature of your home—you select a temperature and the thermostat does the rest".

d. Cloud watch alaram

Option D is correct

the answer is B

D,Amazon CloudWatch - You can use a CloudWatch alarm with Amazon EC2 Auto Scaling to scale your EC2 instances based on demand. REF. https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/WhatIsCloudWatch.html =>>Amazon EC2 Auto Scaling enables you to automatically launch or terminate Amazon EC2 instances based on user-defined policies, health status checks, and schedules. You can use a CloudWatch alarm with Amazon EC2 Auto Scaling to scale your EC2 instances based on demand.

If you specify scaling policies, then Amazon EC2 Auto Scaling can launch or terminate instances as demand on your application increases or decreases.

The AWS service or feature that can initiate an Amazon EC2 Auto Scaling action based on CPU utilization is Amazon CloudWatch alarm. Amazon CloudWatch is a monitoring service that provides metrics and logs on AWS resources and applications. It can be used to monitor the CPU utilization of an Amazon EC2 instance and trigger an Amazon EC2 Auto Scaling action based on predefined thresholds. To do this, a CloudWatch alarm must be set up with the CPU utilization metric, and then configured to trigger the appropriate Amazon EC2 Auto Scaling action when the threshold is met.

https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/WhatIsCloudWatch.html You can use a CloudWatch alarm with Amazon EC2 Auto Scaling to scale your EC2 instances based on demand. For more information, see Dynamic Scaling in the Amazon EC2 Auto Scaling User Guide

D is the correct answer

Answer: D

Amazon CloudWatch alarms can be created on the Auto Scaling group as a whole, such as Average CPUUtilization. This is because alarms are used to tell Auto Scaling when to add/remove instances and such decisions would be based upon the group as a whole.