Oracle OHAI IC3

Company: Oracle Health (OHAI) Level: IC3 Role: Backend Engineer (Java, Python, AI/Backend) YOE: ~3.5 Current CTC: 25 LPA (23 Base) Interview Type: Screening + Loop Rounds

⸻

Screening Round

This round focused mainly on project discussion and coding skills.

Discussion • Explained current project flow • Architecture, design decisions, and outcomes

Coding Questions (Easy–Medium) 1. Valid Anagram–type problem 2. Binary Search–based problem

I provided optimized solutions within ~10 minutes and demonstrated clean coding and good problem-solving approach.

📌 Recruiter called the same day and scheduled loop rounds.

⸻

Loop Rounds

⸻

Round 1: DSA + Core Java (PMTS)

Interviewer was friendly and focused on real-world scenarios.

Topics Covered • OOPS fundamentals • Abstraction & Encapsulation with real-time examples • Design scenario: ATM Machine (design patterns discussion) • Multithreading: • Synchronization • Deadlocks and resolution • Exception handling: • Optimizing exceptions in controller layer • Spring / Spring Boot basics

Coding Question • Binary Tree Zigzag Level Order Traversal (BFS – Medium)

Solved using BFS in ~5 minutes. Overall, the discussion went well and felt positive.

⸻

Round 2: DSA 2 (PMTS)

This round was fully focused on problem solving.

Coding Question • Count Number of Nice Subarrays (Medium)

I started with brute force and discussed multiple approaches. Interviewer was very supportive, gave hints, and even extended time. I understood and explained the optimal idea correctly, but couldn’t fully implement it within time (partial test cases passed).

Mixed feelings after this round, but the interaction was positive.

⸻

Round 3: System Design + Behavioral (SDM)

Started with self-introduction and resume-based discussion.

System Design (HLD) • URL Shortener • APIs • Database design • Scaling strategy • Caching

Behavioral Questions • Innovations done in project • Business improvements suggested • General team and ownership questions

Mostly answered everything well.

⸻

Round 4: Managerial Round (Senior Manager)

This was the most challenging round.

Deep Project Discussion • End-to-end project flow • Architecture diagram • Design decisions • Scalability considerations

Design & Backend Questions • Recent project where I contributed to design • When to use SQL vs NoSQL • Scaling systems • Handling millions of DB records • Caching strategies • Reducing latency

Also discussed SOLID principles and design patterns. I was honest about not explicitly implementing patterns due to project requirements but explained where patterns are implicitly used.

Ended with role-related questions.

⸻

Verdict : Rejected

Didn't receive proper feedback from recruiter and I felt I couldn't able to clear the DSA round is the reason.