How do you ensure backward compatibility in backend systems?
To ensure backward compatibility in backend systems, developers follow certain strategies and best practices. These include versioning, API design, modularization, and comprehensive testing. By versioning the backend systems and APIs, changes can be introduced without breaking existing functionality. This allows clients using older versions to continue working seamlessly. API design principles like clear documentation, stable endpoints, and avoiding breaking changes also contribute to backward compatibility. Modularization allows for easier updates and replacements of individual components without impacting the entire system. Finally, comprehensive testing, including unit, integration, and regression testing, helps identify and fix compatibility issues before deploying updates.