how many failure groups are automatically created?

The database administrator is tasked with creating an ASM disk group. Exadata is not being used.

If failure groups are not specified when creating an ASM disk group containing 10 disks, how
many failure groups are automatically created?

A.
one

B.
two

C.
five

D.
ten

Explanation:
There are always failure groups even if they are not explicitly created. If you do not
specify a failure group for a disk, then Oracle automatically creates a new failure group containing
just that disk, except for disk groups containing disks on Oracle Exadata cells.
Oracle Automatic Storage Management Administrator’s Guide