Which statement is true while performing a tape backup in an RMAN session?

The BACKUP_TAPE_IO_SLAVES parameter is set to FALSE for the database instance.

Which statement is true while performing a tape backup in an RMAN session?

A.
The tape I/O performed is asynchronous

B.
The tape buffer is allocated from the System Global Area (SGA)

C.
The tape buffer is allocated from the Program Global Area (PGA)

D.
Oracle I/O uses an interrupt mechanism to determine when each I/O completes

Explanation:
Tape I/O Slaves
RMAN allocates the tape buffers in the System Global Area (SGA) or the Program Global
Area (PGA), depending on whether I/O slaves are used. If you set the initialization
parameter
BACKUP_TAPE_IO_SLAVES=true, then RMAN allocates tape buffers from the SGA. Tape
devices can only be accessed by one process at a time, so RMAN starts as many slaves as
necessary for the number of tape devices. If the LARGE_POOL_SIZE initialization
parameter is also set, then RMAN allocates buffers from the large pool. If you set
BACKUP_TAPE_IO_SLAVES=false, then RMAN allocates the buffers from the PGA.
If you use I/O slaves, then set the LARGE_POOL_SIZE initialization parameter to dedicate
SGA memory to holding these large memory allocations. This parameter prevents RMAN I/O
buffers from competing with the library cache for SGA memory. If I/O slaves for tape I/O
were requested but there is not enough space in the SGA for them, slaves are not used, and
a message appears in the alert log.
The parameter BACKUP_TAPE_IO_SLAVES specifies whether RMAN uses slave
processes rather than the number of slave processes. Tape devices can only be accessed
by one process at a time, and RMAN uses the number of slaves necessary for the number of
tape devices.