- (Exam Topic 1)
A company is planning to use an Amazon DynamoDB table for data storage. The company is concerned about cost optimization. The table will not be used on most mornings. In the evenings, the read and write traffic will often be unpredictable. When traffic spikes occur, they will happen very quickly.
What should a solutions architect recommend?

1. A. Create a DynamoDB table in on-demand capacity mode.
2. B. Create a DynamoDB table with a global secondary index.
3. C. Create a DynamoDB table with provisioned capacity and auto scaling.
4. D. Create a DynamoDB table in provisioned capacity mode, and configure it as a global table.

Correct Answer: A

- (Exam Topic 1)
A company needs to review its AWS Cloud deployment to ensure that its Amazon S3 buckets do not have unauthorized configuration changes.
What should a solutions architect do to accomplish this goal?

1. A. Turn on AWS Config with the appropriate rules.
2. B. Turn on AWS Trusted Advisor with the appropriate checks.
3. C. Turn on Amazon Inspector with the appropriate assessment template.
4. D. Turn on Amazon S3 server access loggin
5. E. Configure Amazon EventBridge (Amazon Cloud Watch Events).

Correct Answer: D

- (Exam Topic 2)
An ecommerce company hosts its analytics application in the AWS Cloud. The application generates about 300 MB of data each month. The data is stored in JSON format. The company is evaluating a disaster recovery solution to back up the data. The data must be accessible in milliseconds if it is needed, and the data must be kept for 30 days.
Which solution meets these requirements MOST cost-effectively?

1. A. Amazon OpenSearch Service (Amazon Elasticsearch Service)
2. B. Amazon S3 Glacier
3. C. Amazon S3 Standard
4. D. Amazon RDS for PostgreSQL

Correct Answer: C

- (Exam Topic 2)
A company wants to run applications in containers in the AWS Cloud. These applications are stateless and can tolerate disruptions within the underlying infrastructure. The company needs a solution that minimizes cost and operational overhead.
What should a solutions architect do to meet these requirements?

1. A. Use Spot Instances in an Amazon EC2 Auto Scaling group to run the application containers.
2. B. Use Spot Instances in an Amazon Elastic Kubernetes Service (Amazon EKS) managed node group.
3. C. Use On-Demand Instances in an Amazon EC2 Auto Scaling group to run the application containers.
4. D. Use On-Demand Instances in an Amazon Elastic Kubernetes Service (Amazon EKS) managed node group.

Correct Answer: A
https://aws.amazon.com/cn/blogs/compute/cost-optimization-and-resilience-eks-with-spot-instances/

- (Exam Topic 3)
A company is experiencing sudden increases in demand. The company needs to provision large Amazon EC2 instances from an Amazon Machine image (AMI) The instances will run m an Auto Scaling group. The company needs a solution that provides minimum initialization latency to meet the demand.
Which solution meets these requirements?

1. A. Use the aws ec2 register-image command to create an AMI from a snapshot Use AWS Step Functions to replace the AMI in the Auto Scaling group
2. B. Enable Amazon Elastic Block Store (Amazon EBS) fast snapshot restore on a snapshot Provision an AMI by using the snapshot Replace the AMI m the Auto Scaling group with the new AMI
3. C. Enable AMI creation and define lifecycle rules in Amazon Data Lifecycle Manager (Amazon DLM) Create an AWS Lambda function that modifies the AMI in the Auto Scaling group
4. D. Use Amazon EventBridge (Amazon CloudWatch Events) to invoke AWS Backup lifecycle policies that provision AMIs Configure Auto Scaling group capacity limits as an event source in EventBridge

Correct Answer: B
Enabling Amazon Elastic Block Store (Amazon EBS) fast snapshot restore on a snapshot allows you to quickly create a new Amazon Machine Image (AMI) from a snapshot, which can help reduce the initialization latency when provisioning new instances. Once the AMI is provisioned, you can replace the AMI in the Auto Scaling group with the new AMI. This will ensure that new instances are launched from the updated AMI and are able to meet the increased demand quickly.