AWS Certified Developer Associate DVA-C02 Practice Question
A development team is building an application on AWS and needs a way to manage feature flags. They must be able to roll out new features to a small percentage of users initially and quickly roll back if issues arise. It is critical that these configuration changes are deployed independently of application code deployments and are validated before release. Which AWS service is MOST suitable for these requirements?
The correct answer is AWS AppConfig. It is specifically designed for managing and safely deploying application configurations, including feature flags, at scale. AppConfig provides features for validation, gradual deployment strategies (such as canary and linear rollouts), and automatic rollback in case of alarms, which directly meet the requirements.
AWS Systems Manager Parameter Store is a good service for storing configuration data and secrets, but it does not have built-in capabilities for gradual deployment or validation like AppConfig. AWS Secrets Manager is optimized for managing secrets like passwords and API keys, including features for automatic rotation, but it is not the primary tool for deploying feature flags or general application configuration.
CodeConfig is not a real AWS service.
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AWS Certified Developer Associate DVA-C02
Deployment
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