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Integration with AWS Services

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AWS CloudTrail seamlessly integrates with many other AWS services, enhancing the effectiveness of your monitoring activities and providing a more comprehensive picture of the interactions between your applications and AWS resources. By combining CloudTrail logs with other AWS services like Amazon S…

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AWS Certified Solutions Architect - Integration with AWS Services Example Questions

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Question 1

A stateless web application runs on multiple Amazon EC2 instances behind an Auto Scaling group. The team needs a shared session store that provides sub-millisecond access latency, supports TTL-based expiration, and can scale to very high read/write throughput. Which AWS managed service is the best fit?

Correct Answer: Amazon ElastiCache

Amazon ElastiCache (Redis or Memcached) is a managed, in-memory data store that delivers sub-millisecond latency and supports TTL-based key expiration, making it ideal for storing and sharing user session data across multiple web servers. It scales to very high read/write throughput and offers features like clustering and Multi-AZ with automatic failover (Redis) for high availability. Amazon DynamoDB is durable and scalable but is not in-memory and typically has higher latency than an in-memory cache; Amazon S3 is object storage and unsuitable for frequent, low-latency session reads/writes; AWS Lambda is a compute service, not a data store.

Question 2

You have an application that integrates with an Amazon RDS instance. You need to improve the application's performance by caching read queries. Which AWS service should you use to achieve this?

Correct Answer: Amazon RDS Read Replica

An Amazon RDS Read Replica can be used to offload read traffic from the primary database instance, optimizing performance. The other options either do not provide a caching mechanism or are not used for database caching.

Question 3

A company needs to define its AWS infrastructure as code using templates and automatically provision and update those resources across environments in a repeatable, version-controlled way. Which AWS service should they use?

Correct Answer: AWS CloudFormation

AWS CloudFormation is AWS’s infrastructure-as-code service that lets you define resources in JSON/YAML templates and automatically provision, update, and version them as stacks across environments. It supports change sets, drift detection, and StackSets for multi-account and multi-Region deployments, making it the definitive choice for repeatable, automated infrastructure provisioning. AWS CodeCommit is a source code repository service, not an IaC provisioning engine. AWS CodeStar provides project scaffolding and CI/CD orchestration but does not natively model or provision infrastructure. Amazon Elastic Beanstalk automates application deployment and provisions opinionated resources for supported platforms, but it is not a general-purpose IaC service for arbitrary AWS resources.

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