Oracle Sr. Software Engineer interview questions

I got a call after applying in Linkedin, Very unorganized process First round is formal HR round. Second round was postponed for 3 times and recruiter asked for my interview timings and scheduled interview in exactly opposite time. Interviewer didn't even ask for my details and literally grilled me on CS background for whole 1 hour

Team Netsuite: 1 Phone screen by the recruiter 1 phone interview with the hiring manager. I was flew to onsite in 4-5 day notice. I had to call oracle booking and book flight tickets, and room accommodation is refunded later which i had to book on my own. 3 rounds of onsite interview. Two lasting 1.5 hours and the last one is just half hour with the hiring manager/director