Task 2.1: Design Scalable and Loosely Coupled Architectures SAA-C03 Practice Questions (Page 5)

Questions 21–25

1. 21application · medium

   A company is planning to migrate a legacy monolithic application to run in containers on AWS. The application is a long-running web service with a stateful session. The company wants to minimize the operational overhead of managing the container orchestration control plane. Which solution should a solutions architect recommend?

   • AUse Amazon EKS with managed node groups.
   • BUse Amazon ECS with AWS Fargate launch type.
   • CUse AWS Elastic Beanstalk with the Docker platform.
   • DUse Amazon EC2 instances and install Docker directly, then run the containers manually.
   Reveal Solution Discussion Select an answer first
2. 22application · medium

   A company has a microservices architecture for its e-commerce platform. When a new order is placed, the order service needs to notify several other services: the inventory service to update stock, the shipping service to create a shipment, and the analytics service to record the event. The company wants to decouple the order service from these downstream services so that a failure in one does not affect the others. Which solution should a solutions architect recommend?

   • AUse AWS Step Functions to orchestrate the calls to each downstream service sequentially.
   • BCreate an Amazon SNS topic. Have the order service publish an event to the topic, and have each downstream service subscribe to the topic.
   • CHave the order service invoke each downstream service's API directly using synchronous HTTP calls.
   • DCreate a separate Amazon SQS queue for each downstream service. Have the order service send a message to each queue.
   Reveal Solution Discussion Select an answer first
4. 23application · medium

   A company runs a customer relationship management (CRM) application on a single Amazon RDS for PostgreSQL instance. The application has a high read-to-write ratio, with users frequently querying customer data. The company is experiencing performance issues due to the high read load on the primary database instance. Which solution should a solutions architect recommend to offload the read traffic?

   • AUse an Application Load Balancer to distribute read traffic between the primary instance and a read replica.
   • BCreate an Amazon RDS read replica and configure the application to route read queries to the replica.
   • CIncrease the size of the primary database instance to a larger instance type.
   • DUse an Amazon ElastiCache cluster to cache the results of all database queries.
   Reveal Solution Discussion Select an answer first
5. 24foundation · easy

   Which AWS service allows you to run code without provisioning or managing servers, and you pay only for compute time used?

   • AAWS Elastic Beanstalk
   • BAWS Lambda
   • CAmazon ECS
   • DAmazon EC2
   Reveal Solution Discussion Select an answer first
6. 25foundation · easy

   In a microservices architecture, which characteristic best describes a stateless service?

   • AIt requires a database to store all application data.
   • BIt can only scale vertically.
   • CIt maintains session data in memory for each user.
   • DIt does not store any state between requests; each request is independent.
   Reveal Solution Discussion Select an answer first