Describe the "Four Rs" of cloud migration.

The "Four Rs" of cloud migration provide a framework for organizations to strategically plan their transition to the cloud. The correct answer identifies these categories as Rehost, Refactor, Revise, and Rebuild.

Rehosting (often referred to as "lift and shift") involves moving applications to the cloud with minimal changes, enabling organizations to quickly benefit from cloud resources without significant alterations to the application architecture. This approach is typically used for existing applications that need to be migrated swiftly to enhance scalability and availability.

Refactoring entails making more significant changes to application code to leverage cloud-native features, which helps improve performance, scalability, and cost-effectiveness. This approach might include breaking monolithic applications into microservices or integrating with cloud-managed services.

Revising refers to making necessary adjustments while rehosting and refactoring to optimize the applications post-migration, ensuring they align well with the cloud environment and meet business needs efficiently.

Rebuilding goes further in that it entails creating new applications from scratch using cloud-native development principles, thus fully leveraging the capabilities of the cloud rather than just moving existing applications into the new environment.

This structured approach allows organizations to choose the most appropriate migration strategy based on their specific needs and application workloads, thus enhancing their cloud adoption process.