Explanation:
RMAN automatically performs full or partial resynchronizations as needed in certain situations. Most RMAN commands such as BACKUP, COPY, DELETE, and so forth perform a full or partial resynchronization (depending on whether the schema metadata has changed) automatically when the target database control file is mounted and the recovery catalog database is available. Incorrect Answer:
3: CHANGE command does not cause a resynchronization of the recovery catalog.
5: CATALOG command does not cause a resynchronization of the recovery catalog.
Reference:
OCP Oracle 9i Database: Fundamentals II Exam Guide, Rama Velpuri, p. 224-225
Chapter 9: Oracle Recovery Manager Overview and Configuration

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