Reference: http://www.orafaq.com/faqdbacv.htm

1. Did you use online or off-line backups?
2. What version of Oracle were you running?
3. Haw many databases and what sizes?
4. If you have to advise a backup strategy for a new application, how would you approach it and what questions will you ask?
5. If a customer calls you about a hanging database session, what will you do to resolve it?
6.Compare Oracle to any other database that you know. Why would you prefer to work on one and not on the other?