Explanation:
DBA needs to perform a media recovery when a data file is not synchronized with the other data files, redo logs, and control files.
Incorrect Answers:
1: Oracle will recover database automatically during startup after instance crash.
2: User will just create new session to connect to database after this error.
3: Oracle database will just needs to be restarted to fix this problem.
4: After the database is shutdown by using SHUTDOWN TRANSACTIONAL recovery is not required at all.
Oracle 8, DBA Certification Exam Guide, Jason S. Couchman, p. 675-688
Chapter 14: Database Failure and Recovery

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