1. A company's web application is using multiple Linux Amazon EC2 instances and storing data on Amazon EBS volumes. The company is looking for a solution to increase the resiliency of the application in case of a failure and to provide storage that complies with atomicity, consistency, isolation, and durability (ACID). What should a solutions architect do to meet these requirements?

A) Launch the application on EC2 instances in each Availability Zone. Attach EBS volumes to each EC2 instance.
B) Create an Application Load Balancer with Auto Scaling groups across multiple Availability Zones. Mount an instance store on each EC2 instance.
C) Create an Application Load Balancer with Auto Scaling groups across multiple Availability Zones. Store data using Amazon S3 One Zone-Infrequent Access (S3 One Zone-IA).
D) Create an Application Load Balancer with Auto Scaling groups across multiple Availability Zones. Store data on Amazon EFS and mount a target on each instance.



2. A company is hosting a web application on AWS using a single Amazon EC2 instance that stores user-uploaded documents in an Amazon EBS volume. For better scalability and availability, the company duplicated the architecture and created a second EC2 instance and EBS volume in another Availability Zone, placing both behind an Application Load Balancer. After completing this change, users reported that, each time they refreshed the website, they could see one subset of their documents or the other, but never all of the documents at the same time.What should a solutions architect propose to ensure users see all of their documents at once?

A) Copy the data so both EBS volumes contain all the documents.
B) Configure the Application Load Balancer to direct a user to the server with the documents.
C) Copy the data from both EBS volumes to Amazon EFS. Modify the application to save new documents to Amazon EFS.
D) Configure the Application Load Balancer to send the request to both servers. Return each document from the correct server.



3. A solutions architect is helping a developer design a new ecommerce shopping cart application using AWS services. The developer is unsure of the current database schema and expects to make changes as the ecommerce site grows. The solution needs to be highly resilient and capable of automatically scaling read and write capacity.Which database solution meets these requirements?

A) Amazon SQS and Amazon Aurora PostgreSQL
B) Amazon DynamoDB with on-demand enabled
C) Amazon Aurora PostgreSQL
D) Amazon DynamoDB with DynamoDB Streams enabled



4. A company hosts its website on AWS. To address the highly variable demand, the company has implemented Amazon EC2 Auto Scaling. Management is concerned that the company is over-provisioning its infrastructure, especially at the front end of the three-tier application. A solutions architect needs to ensure costs are optimized without impacting performance. What should the solutions architect do to accomplish this?

A) Use Auto Scaling with a target tracking scaling policy.
B) Use Auto Scaling with a scheduled scaling policy.
C) Use Auto Scaling with Reserved Instances.
D) Use Auto Scaling with the suspend-resume feature



5. A company is building applications in containers. The company wants to migrate its on-premises development and operations services from its on-premises data center to AWS. Management states that production system must be cloud agnostic and use the same configuration and administrator tools across production systems. A solutions architect needs to design a managed solution that will align open-source software. Which solution meets these requirements?

A) Launch the containers on Amazon EC2 with EC2 instance worker nodes.
B) Launch the containers on Amazon Elastic Kubernetes Service (Amazon EKS) and EKS workers nodes.
C) Launch the containers on Amazon Elastic Containers service (Amazon ECS) with AWS Fargate instances.
D) Launch the containers on Amazon Elastic Container Service (Amazon ECS) with Amazon EC2 instance worker nodes.