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Kubernetes uses ConfigMaps and Secrets to facilitate this need in containerized application development. The main purpose of using a ConfigMap is to decouple the application configuration data from the application itself. This separation improves the reusability of the container as a decoupled architecture enables developers to use and test containerized applications under different configurations. Secrets are designed to store sensitive application data such as passwords, tokens, etc. This disconnect essentially prevents the need to include confidential data within the application code.