Explanation:
RMAN will generate several backupsets, one for each block size, when you issue the RMAN BACKUP command.
Incorrect Answers:
1: You don’t have to issue a separate RMAN BACKUP command to group tablespaces with the same block size. RMAN will generate several backupsets, one for each block size.
2: You don’t need to use the RMAN BACKUP BLOCKSIZE=nK command to backup these tablespaces with different block sizes.
3: One backup set cannot contain tablespaces of different block sizes. But RMAN will generate several backupsets, one for each block size when you issue the RMAN BACKUP command.[/code] Reference:[/code] OCP Oracle9i Database: New Features for Administrators, Daniel Benjamin, p. 183-189[/code] Chapter 3: Manageability Enhancements[/code] Oracle 9i New Features, Robert Freeman, p. 79-86[/code] Chapter 3: New Oracle9i Availability and Recoverability Features

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