An AWS CodePipeline pipeline has implemented a code release process. The pipeline is integrated with AWS CodeDeploy to deploy versions of an application to multiple Amazon EC2 instances for each CodePipeline stage.
During a recent deployment, the pipeline failed due to a CodeDeploy issue. The DevOps team wants to improve monitoring and notifications during deployment to decrease resolution times.
What should the DevOps Engineer do to create notifications when issues are discovered?

You need to create a simple, holistic check for your system's general availablity and uptime. Your system
presents itself as an HTTP-speaking API. What is the most simple tool on AWS to achieve this with?

What is server immutability?

You currently run your infrastructure on Amazon EC2 instances behind an Auto Scaling group> All logs for you application are currently written to ephemeral storage.
Recently your company experienced a major bug in code that made it through testing and was ultimately deployed to your fleet.
This bug triggered your Auto Scaling group to scale up and back down before you could successfully retrieve the logs off your server to better assist you in troubleshooting the bug.
Which technique should you use to make sure you are able to review your logs after your instances have shut down?

A company has multiple development teams sharing one AWS account. The development team's manager wants to be able to automatically stop Amazon EC2 instances and receive notifications if resources are idle and not tagged as production resources Which solution will meet these requirements?