Explanation:
Oracle Expert collects data in many different areas, such as the application, instance configuration, structure changes, and overall workload on the production machine hosting Oracle.
Incorrect Answers:

1: Oracle Expert does not provide session level tuning.
5: Oracle Expert does not provide operation system level tuning.
Oracle 8, DBA Certification Exam Guide, Jason S. Couchman, p. 962-963. Chapter 20: Tuning Other Areas of the Oracle Database

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