Oracle Senior Developer interview questions

Applied through linkedin. Got a call next day from an internal recruiter, 30min chat about my CV. They put me forward for a coding interview. From the initial call to the interview took less than a week. All people I interacted with were super nice and clear about the process. The engineer who interviewed me was very helpful and gave me some extra time, which was much appreciated.

No HR were involved. A project manager called and took 30 min discussion. 1st round two programming questions ( spiral matrix, tree level avg) 2nd round 2 programs on graph and forest. (3rd round designing question) . Then managerial. 3rd round was disappointing the person was not listening the explanation and was busy at his household thing.