Which technology increases deduplication efficiency in an image-level backup of a VMware virtual machine?

An administrator targets a backup to a disk storage device, but the backup goes into a queued state due to insufficient disk space.

Which action should the administrator take to ensure the next backup completes successfully?

Which two options can an administrator use to prevent data on disk that is from a previously run backup job from being deleted? (Select two.)

Which backup method for files and folders is selected by default in Backup Exec?

Which condition prevents Data Lifecycle Management (DLM) from being able to delete an expired backup set?