Task 2.1: Design Scalable and Loosely Coupled Architectures SAA-C03 Practice Questions (Page 1)

Questions 1–5

1. 1foundation · easy

   In a multi-tier architecture, which tier is responsible for handling user interface and presentation logic?

   • AApplication tier
   • BData tier
   • CNetworking tier
   • DPresentation tier
   Reveal Solution Discussion Select an answer first
2. 2application · medium

   A global news website serves static content (images, CSS, JavaScript) and dynamic content (personalized news feeds) from a fleet of EC2 instances behind an Application Load Balancer. The website experiences high traffic spikes and users in different geographic regions report slow page loads. The company wants to reduce latency for all users and offload static content requests from the EC2 instances. Which combination of actions should a solutions architect take?

   • APlace an Amazon CloudFront distribution in front of the ALB and configure it to cache both static and dynamic content.
   • BMove all content to Amazon S3 and use S3 Transfer Acceleration for all requests.
   • CIncrease the size of the EC2 instances to handle the load and use Amazon Route 53 latency-based routing.
   • DCreate an Amazon ElastiCache cluster and store all static and dynamic content in it.
   Reveal Solution Discussion Select an answer first
4. 3foundation · easy

   A web application experiences increased traffic and needs to handle more concurrent requests. Which scaling approach involves adding more EC2 instances to the application tier?

   • AHorizontal scaling
   • BElastic scaling
   • CPredictive scaling
   • DVertical scaling
   Reveal Solution Discussion Select an answer first
5. 4application · medium

   A company is migrating a monolithic order-processing application to a microservices architecture. The frontend web application must submit orders to a backend service without waiting for the order to be fully processed. The backend service is currently an AWS Lambda function that performs validation, payment, and inventory updates. The company wants to ensure that if the Lambda function fails, the order is not lost and can be retried. Which solution should a solutions architect recommend?

   • AConfigure the frontend to invoke the Lambda function synchronously via the AWS SDK, and implement retry logic in the frontend.
   • BCreate an Amazon SQS queue. Have the frontend send the order to the queue, and configure the Lambda function with the queue as an event source.
   • CUse Amazon API Gateway to create a REST endpoint that directly integrates with the Lambda function using an AWS service proxy.
   • DCreate an Amazon SNS topic. Have the frontend publish the order to the topic, and subscribe the Lambda function to the topic.
   Reveal Solution Discussion Select an answer first
6. 5application · medium

   A company is designing a new web application in the AWS Cloud. The application consists of a web tier, an application tier, and a database tier. The company wants to ensure that the web tier can scale independently from the application tier and that the database is not publicly accessible. Which architecture should a solutions architect recommend?

   • APlace the web tier in a public subnet, and the application and database tiers in private subnets. Use an Application Load Balancer for the web tier and a Network Load Balancer for the application tier.
   • BPlace the web and application tiers in a public subnet, and the database in a private subnet.
   • CUse a single EC2 instance to run the web server, application, and database to simplify the architecture.
   • DPlace all tiers in a single public subnet and use security groups to restrict access between them.
   Reveal Solution Discussion Select an answer first