You have used the CROSSCHECK BACKUP command to verify that the backups recorded in the RMAN repository actually exist. Which command should you now use to check if any of the files were missing?

After CROSSCHECK BACKUP validates files against the RMAN repository, use LIST EXPIRED to view backup records whose files are missing. This shows which backups exist in metadata but not on disk. DELETE EXPIRED would remove these records (possibly irreversible), DELETE OBSOLETE removes backups no longer needed per retention policy, and CHANGE UNCATALOG removes records entirely.