Explanation:
You need to recreate a control file if MAXLOGMEMBERS parameter needs to be changed. 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: You don't need to create a new control file when all redo log files a lost.
3: You don't need to create a new control file when RECOVERY_PARALLELISM needs to be changed.
4: You don't need to create a new control file if the name of the parameter file is changed.
Oracle 8, DBA Certification Exam Guide, Jason S. Couchman, p. 719-720
Chapter 15: Advanced Topics in Data Recovery

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