AWS Associate Certified Developer - Associate 3

Question 1

A developer stores session data in ElastiCache Redis. The application needs to handle Redis connection failures gracefully. What is the recommended pattern?

Accepted Answer

Implement circuit breaker with fallback to stateless processing

Answer

A circuit breaker pattern detects failures and falls back gracefully, preventing cascading failures while maintaining availability.

Question 2

Which AWS service should a developer use to automatically rotate database credentials without modifying application code?

Accepted Answer

AWS Secrets Manager

Answer

AWS Secrets Manager natively integrates with RDS, Redshift, and DocumentDB to automatically rotate credentials on a schedule.

Question 3

A CloudFormation stack deployment fails midway. What happens to previously created resources by default?

Accepted Answer

They are retained and the stack enters ROLLBACK_COMPLETE state

Answer

By default, CloudFormation rolls back all changes on failure, deleting resources created during the failed deployment and entering ROLLBACK_COMPLETE.

Question 4

A developer needs to trigger a Lambda function whenever an item is modified in a DynamoDB table. What should they enable?

Accepted Answer

DynamoDB Streams

Answer

DynamoDB Streams captures item-level changes and can trigger Lambda functions to process each change record.

Question 5

An API Gateway REST API must only be accessible from within a VPC. Which endpoint type should be configured?

Accepted Answer

Private endpoint

Answer

Private API Gateway endpoints are accessible only from within a VPC using a VPC endpoint (PrivateLink), blocking public internet access.

AWS Practice Test

AWS Practice Test

AWS Associate Certified Developer - Associate 3