Amazon Web Services Updated SAA-C03 Exam Questions and Answers by solomon

An Auto Scaling group is a collection of EC2 instances that share similar characteristics and can be scaled in or out automatically based on demand. An Auto Scaling group can have a scheduled action, which is a configuration that tells the group to scale to a specific size at a specific time. This way, the company can scale up to six instances each Friday evening to handle the increased workload, and scale down to two instances at other times to save costs. This solution meets the requirements with the least operational overhead, as it does not require manual intervention or custom scripts.

References:

1 explains how to create a scheduled action for an Auto Scaling group.

2 describes the concept and benefits of an Auto Scaling group.

Composite alarms determine their states by monitoring the states of other alarms. You can **use composite alarms to reduce alarm noise**. For example, you can create a composite alarm where the underlying metric alarms go into ALARM when they meet specific conditions. You then can set up your composite alarm to go into ALARM and send you notifications when the underlying metric alarms go into ALARM by configuring the underlying metric alarms never to take actions. Currently, composite alarms can take the following actions: https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/Create_Composite_Alarm.html

This solution meets the requirement of migrating a Windows-based application that requires the use of a shared Windows file system attached to multiple Amazon EC2 Windows instances that are deployed across multiple Availability Zones. Amazon FSx for Windows File Server provides fully managed shared storage built on Windows Server, and delivers a wide range of data access, data management, and administrative capabilities. It supports the Server Message Block (SMB) protocol and can be mounted to EC2 Windows instances across multiple Availability Zones.

Option A is incorrect because AWS Storage Gateway in volume gateway mode provides cloud-backed storage volumes that can be mounted as iSCSI devices from on-premises application servers, but it does not support SMB protocol or EC2 Windows instances. Option C is incorrect because Amazon Elastic File System (Amazon EFS) provides a scalable and elastic NFS file system for Linux-based workloads, but it does not support SMB protocol or EC2 Windows instances. Option D is incorrect because Amazon Elastic Block Store (Amazon EBS) provides persistent block storage volumes for use with EC2 instances, but it does not support SMB protocol or attaching multiple instances to the same volume.

References:

https://aws.amazon.com/fsx/windows/

https://docs.aws.amazon.com/fsx/latest/WindowsGuide/using-file-shares.html

https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/rds-custom.html and https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/working-with-custom-oracle.html