Explanation:
The verification of structural integrity of Oracle database files is done with the DBVERIFY utility. DBVERIFY is a utility that verifies the integrity of a datafile backup or production file. It can be used either to verify that a backup is usable, to verify the usability of a production database, or to diagnose where corruption is suspected on a datafile or backup. The utility can be used to verify the data files of a backup database.
Incorrect Answers:
1: DBVERIFY utility does not work with online data files.
3: This utility cannot be used to archive log files.
4: This utility is external to database and cannot impact database activities.
Oracle 8, DBA Certification Exam Guide, Jason S. Couchman, p. 659-661
Chapter 14: Database Failure and Recovery

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