What is true about “Parallel Backups” in Oracle 11g? Choose all that apply
If the datafile resides on only one disk, there is no advantage of using parallel backups
The size of all the sections of a datafile involved in “Parallel backup” are always same
The size of all the sections of a datafile involved in “Parallel backup” are always same except the size of the last section
All the sections of one datafile are backed up by the same channel
All the sections of one datafile are backed up by different channels