Explanation:
You may encounter situations requiring you to reconstruct or replace a lost or damaged control file on your Oracle database. Several situations indicate this need, including loss of all control files for your database due to media failure, needing to change option settings specified in your CREATE DATABASE statement (MAXLOGFILES, MAXDATAFILES, MAXLOGMEMBERS, and others), and wanting to change the name of the database.
Incorrect Answers:
1: It is not required to create a new control file when all archived redo log files are lost.
3: You don't need to create a new control file when ARCHIVE_LOG_START needs to be changed.
4: It is not required to create a new control file when the name of the recovery catalog file needs to be changed.
Oracle 8, DBA Certification Exam Guide, Jason S. Couchman, p. 719-720
Chapter 15: Advanced Topics in Data Recovery

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