Explanation/Reference:
B: The following command could be used to pin the table CUSTOMERS in Exadata Smart Flash Cache
ALTER TABLE customers STORAGE (CELL_FLASH_CACHE KEEP)
C: Creating Flash Disks Out Of The Flash Cache
When an Exadata cell is installed, by default, all the flash is assigned to be used as flash cache and user data is automatically cached using the default caching behavior. Optionally, a portion of the cache can be reserved and used as logical flash disks. These flash disks are treated like any Exadata cell disk in the Exadata cell except they actually reside and are stored as non-volatile disks in the cache.
Note:
* Pinning Objects In The Flash Cache
Preferential treatment over which database objects are cached is also provided with the Exadata Smart Flash Cache. For example, objects can be pinned in the cache and always be cached, or an object can be identified as one which should never be cached. This control is provided by the new storage clause attribute, CELL_FLASH_CACHE, which can be assigned to a database table, index, partition and LOB column
* There are two techniques provided to manually use and manage the cache. The first enables the pinning of objects in the flash cache. The second supports the creation of logical disks out of the flash for the permanent placement of objects on flash disks.