Oracle Sr Developer interview questions

Recruiter reached out with generic questions, compensation and then emailed a link to schedule the phone screen. Technical Screen: Interviewer was very friendly. It was a discussion about my past experience and some behavioral questions. Then asked me a leetcode medium question. Solved it, I was moved to next rounds that are called loop interviews. There will be a 30min session with HR to understand what can be expected in the loop rounds. There will be 4 rounds on the same day with 2 coding challenge rounds, 1 system design and 1 Behavioral with hiring manager. Round 1: Coding challenge the interviewer was interactive. Asked a leetcode medium on graphs and some behavioral questions. Round 2: Behavioral with HM. This interviewer was not friendly at all. I have never interacted with someone who can drain all my energy. It seemed like no matter what I say, he had a very judgy look and was not welcoming. I usually do well in behavioral interviews but this was a disaster. I lost all my hope after this round. But pulled my self back for the next rounds soon. Round 3: System Design. It was a great conversation and I did well. Very warm and friendly interviewer. Round 4: Coding Challenge. Was asked a leetcode medium on graph shortest path from source to destination. The recruiter was very friendly. Verdict: no hire