Which two statements about Oracle Direct Network File System (NFS) are true? (Choose two.)
A.
It bypasses the OS file system cache.
B.
A separate NFS interface is required for use across Linux, UNIX, and Windows platforms.
C.
It uses the operating system kernel NFS layer for user tasks and network communication modules.
D.
File systems need not be mounted by the kernel NFS system when being served through Direct NFS.
E.
Oracle Disk Manager can manage NFS on its own, without using the operating system kernel NFS driver.
http://docs.oracle.com/cd/E11882_01/install.112/e41962/whatsnew.htm#RILIN954
Oracle Disk Manager Network File System Management
Oracle Disk Manager (ODM) can manage network file systems (NFS) on its own, without using the operating system kernel NFS driver. This is referred to as Direct NFS. Direct NFS implements NFS version 3 protocol within the Oracle Database kernel. This change enables monitoring of NFS status using the ODM interface. The Oracle Database kernel driver tunes itself to obtain optimal use of available resources.