Explanation:
There are two benefits of using RMAN with a catalog: you can store scripts for backup and recovery operations and maintain records of backup and recovery operations.
Incorrect Answers:
1: You cannot copy the redo-log history into the control file with catalog or without it.
3: The target database can be registered with recovery catalog and without it.
5: You can synchronize the recovery catalog and the target database using RESYNC CATALOG command, but the recovery catalog is not updated when a log switch occurs, when a log file is archived, or when datafiles or redo logs are added.
Oracle 8, DBA Certification Exam Guide, Jason S. Couchman, p. 615-623 Chapter 13: Using Recovery
Manager for Backups

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