What solution should be recommended to provide a failback option for future application deployments?

Versioning is the recommended solution to provide a failback option for future application deployments because it allows for the systematic management of changes made to software or applications. By assigning version numbers to each iteration of the application, developers can keep track of modifications and readily identify the state of the application at any point in time.

When an update introduces issues or fails to perform as expected, versioning enables the team to revert to a previous version quickly and efficiently. This rollback capability is crucial for maintaining application reliability and minimizing downtime. Additionally, it ensures that users can access a stable version of the application while the issues with the newer version are resolved.

In contrast, while implementing a code scanner can contribute to identifying vulnerabilities in the code, it does not facilitate reverting to previous versions of an application. Code signing provides assurance about the integrity and authenticity of the software but does not offer a mechanism for managing different versions over time. A security requirements traceability matrix (SRTM) is useful for aligning security requirements with project requirements but does not provide a method for deploying or rolling back application versions. Thus, versioning stands out as the most effective solution to achieve a reliable failback capability during application deployments.