I applied through an employee referral. The process took 3+ months. I interviewed at Oracle (Reston, VA) in Jan 2012
Interview
Phone screening and talking to 3 different people of different levels, one of them will be very technical and only ask technical questions. They will ask your experience on the field and that you provide a good description of your consulting background. They also ask technical questions.
Interview questions [1]
Question 1
Asked about my skills in database, asked to provide a solution to a problem they have described.
2 rounds of technical - They will ask all the technical questions based on your resume. Quite difficult
1 Manager Round - They will ask technical questions and managerial questions
There was 2 technical interview and one managerial round. L1 round was with some Java coding using stream and theoretical questions and L2 round was more about the scenario based questions
Interview mostly they will ask the basics but from each and every topic for Oracle DBA like configuration, architecture, RMAN, EXP/IMP, Performance Tuning, RAC, Golden Gate, Exadata and Cloud platform question etc.