Block Change Tracking (BCT):
Enabling BCT withRMANsignificantly speeds upincremental backupsby recording changes made to data blocks since the last backup. Instead of scanning the entire database to detect changes, RMAN consults the block change tracking fileto identify modified blocks, reducing backup time and I/O.
BCT is especially beneficial in large databases where full backups would be time-consuming and resource- intensive. Incremental backups become more efficient, makingdaily or more frequent backups feasible.
Why the other options are incorrect:
* A:Full backups are still required periodically.
* C:Encryption is separate from BCT functionality.
* D:Point-in-time recovery is facilitated by backup logs, not BCT directly.
* E:Integrity checks are performed during validation, not as part of BCT.