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Topic 1: Exam Pool A
A development team runs monthly resource-intensive tests on its general purpose Amazon RDS for MySQL DB instance with Performance Insights enabled. The testing lasts for 48 hours once a month and is the only process that uses the database. The team wants to reduce the cost of running the tests without reducing the compute and memory attributes of the DB instance.
Which solution meets these requirements MOST cost-effectively?
A. Stop the DB instance when tests are completed. Restart the DB instance when required.
B. Use an Auto Scaling policy with the DB instance to automatically scale when tests are completed.
C. Create a snapshot when tests are completed. Terminate the DB instance and restore the snapshot when required.
D. Modify the DB instance to a low-capacity instance when tests are completed. Modify the DB instance again when required.
Explanation: To reduce the cost of running the tests without reducing the compute and memory attributes of the Amazon RDS for MySQL DB instance, the development team can stop the instance when tests are completed and restart it when required. Stopping the DB instance when not in use can help save costs because customers are only charged for storage while the DB instance is stopped. During this time, automated backups and automated DB instance maintenance are suspended. When the instance is restarted, it retains the same configurations, security groups, and DB parameter groups as when it was stopped.
A company runs a web application that is deployed on Amazon EC2 instances in the private subnet of a VPAn Application Load Balancer (ALB) that extends across the public subnets directs web traffic to the EC2 instances. The company wants to implement new security measures to restrict inbound traffic from the ALB to the EC2 instances while preventing access from any other source inside or outside the private subnet of the EC2 instances. Which solution will meet these requirements?
A. Configure a route in a route table to direct traffic from the internet to the private IP addresses of the EC2 instances.
B. Configure the security group for the EC2 instances to only allow traffic that comes from the security group for the ALB.
C. Move the EC2 instances into the public subnet. Give the EC2 instances a set of Elastic IP addresses.
D. Configure the security group for the ALB to allow any TCP traffic on any port.
Explanation: To restrict inbound traffic from the ALB to the EC2 instances, the security group for the EC2 instances should only allow traffic that comes from the security group for the ALThis way, the EC2 instances can only receive requests from the ALB and not from any other source inside or outside the private subnet.
A company wants to manage Amazon Machine Images (AMIs). The company currently copies AMIs to the same AWS Region where the AMIs were created. The company needs to design an application that captures AWS API calls and sends alerts whenever the Amazon EC2 CreateImage API operation is called within the company’s account. Which solution will meet these requirements with the LEAST operational overhead?
A. Create an AWS Lambda function to query AWS CloudTrail logs and to send an alert when a CreateImage API call is detected.
B. Configure AWS CloudTrail with an Amazon Simple Notification Service (Amazon SNS) notification that occurs when updated logs are sent to Amazon S3. Use Amazon Athena to create a new table and to query on CreateImage when an API call is detected.
C. Create an Amazon EventBridge (Amazon CloudWatch Events) rule for the CreateImage API call. Configure the target as an Amazon Simple Notification Service (Amazon SNS) topic to send an alert when a CreateImage API call is detected.
D. Configure an Amazon Simple Queue Service (Amazon SQS) FIFO queue as a target for AWS CloudTrail logs. Create an AWS Lambda function to send an alert to an Amazon Simple Notification Service (Amazon SNS) topic when a CreateImage API call is detected.
A company provides an API interface to customers so the customers can retrieve their financial information. The company expects a larger number of requests during peak usage times of the year. The company requires the API to respond consistently with low latency to ensure customer satisfaction. The company needs to provide a compute host for the API. Which solution will meet these requirements with the LEAST operational overhead?
A. Use an Application Load Balancer and Amazon Elastic Container Service (Amazon ECS).
B. Use Amazon API Gateway and AWS Lambda functions with provisioned concurrency.
C. Use an Application Load Balancer and an Amazon Elastic Kubernetes Service (Amazon EKS) cluster.
D. Use Amazon API Gateway and AWS Lambda functions with reserved concurrency.
Explanation: Amazon API Gateway is a fully managed service that makes it easy for developers to create, publish, maintain, monitor, and secure APIs at any scale. AWS Lambda is a serverless compute service that lets you run code without provisioning or managing servers. Lambda scales automatically based on the incoming requests, but it may take some time to initialize new instances of your function if there is a sudden increase in demand. This may result in high latency or cold starts for your API. To avoid this, you can use provisioned concurrency, which ensures that your function is initialized and ready to respond at any time. Provisioned concurrency also helps you achieve consistent low latency for your API by reducing the impact of scaling on performance.
A company has five organizational units (OUs) as part of its organization in AWS Organizations. Each OU correlates to the five businesses that the company owns. The company's research and development (R&D) business is separating from the company and will need its own organization. A solutions architect creates a separate new management account for this purpose. What should the solutions architect do next in the new management account?
A. Have the R&D AWS account be part of both organizations during the transition.
B. Invite the R&D AWS account to be part of the new organization after the R&D AWS account has left the prior organization.
C. Create a new R&D AWS account in the new organization. Migrate resources from the prior R&D AWS account to the new R&D AWS account.
D. Have the R&D AWS account join the new organization. Make the new management account a member of the prior organization.
Explanation: it allows the solutions architect to create a separate organization for the research and development (R&D) business and move its AWS account to the new organization. By inviting the R&D AWS account to be part of the new organization after it has left the prior organization, the solutions architect can ensure that there is no overlap or conflict between the two organizations. The R&D AWS account can accept or decline the invitation to join the new organization. Once accepted, it will be subject to any policies and controls applied by the new organization.
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