Explanation:
To query an existing view you need to have SELECT privileges on the view.
Incorrect Answers:
1: The underlying tables can be without data: view will work correctly in that case.
3: The underlying tables can be in different user schema.
4: You need SELECT privileges not only on the underlying tables, but on the view also.
OCP Introduction to Oracle 9i: SQL Exam Guide, Jason Couchman, p. 356-359
Chapter 8: User Access Control in Oracle

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