How would you answer an interview scenario involving build validation?

In an interview, I would first define build validation and the problem it solves, then explain how I would run deterministic builds, unit and relevant integration tests, static analysis, dependency checks, contract validation, and artifact verification with clear failure feedback. I would also call out the main failure mode: running only compilation while deferring tests and security checks until after merge increases feedback time and lets known defects accumulate. Finally, I would describe how I would test, monitor, and safely roll back or recover the solution.