Which three features are unique to Exadata Storage? (Choose three.)
A.
grid disks with default AU allocation sizes of 1 MB
B.
usage of flash technology to cache recently used data
C.
prioritization of disk I/Os based on the database
D.
prioritization of OLTP I/Os over scan I/Os
E.
database storage flash cache space allocation guarantees and limits
B, C, E
not A: Default 1M asm AU is default for any Oracle ASM Diskgroup. In Exadata is preferred to set ASM AU more than 4MB
B,C,E are correct anwsers.