An architecture uses Amazon API Gateway and AWS Lambda. During traffic spikes, the backend database becomes overwhelmed, causing Lambda functions to timeout and fail. How can the architect improve the reliability of this system with the LEAST architectural changes?

Answer options:

Migrate the database to Amazon DynamoDB.

Implement Amazon SQS as a buffer between API Gateway and Lambda.

Increase the timeout setting on the Lambda functions.

Use AWS Step Functions to orchestrate the API calls.

How to approach this question

Identify the pattern for decoupling and buffering requests to protect downstream systems.

B.Implement Amazon SQS as a buffer between API Gateway and Lambda.✓ Correct

Implement Amazon SQS as a buffer between API Gateway and Lambda.

Amazon SQS provides a reliable, highly scalable queue that can buffer requests, preventing downstream services like databases from being overwhelmed.

Increasing Lambda timeouts, which just leads to longer failures and higher costs.

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