Explanation:
To stop automatic archiving of redo log files you need to issue the ALTER SYSTEM ARCHIVE LOG STOP command, set LOG_ARCHIVE_START to FALSE in the parameter file and restart the database.
Incorrect Answers:
2: The ALTER SYSTEM SET LOG_ARCHIVE_START=FALSE command works just for session, not instance, level, so it will not stop archiving of redo log files.
3: There is no LOG_ARCHIVE_STOP parameter in the initialization file in Oracle.
Oracle 8, DBA Certification Exam Guide, Jason S. Couchman, p. 585-591
Chapter 12: Overview of Backup and Recovery

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