Which component of PowerProtect DD is Data Invulnerability Architecture a feature of?

What is the maximum number of snapshots per MTree that can be stored on a PowerProtect DD

Which two applications use the client direct feature? (Select 2)

What system role is required to create the second security officer for a PowerProtect DD?

A customer requires a backup for their daily operational data. They do not back up directly to the PowerProtect DD appliance using Avamar backup software.
What will be the result of the backup process?