Dsa,puzzle,OS. They have asked questions from tree,2 puzzle and 2OS questions. Do revise this before interview. Moderate level interview. Good experience with the interviewer. Enough time to solve and discuss approach

There were a total of 6 interview rounds. The process started with an online coding assessment consisting of DSA and aptitude questions. After clearing it, I had two technical rounds focused on data structures, algorithms, OOPs, DBMS, and operating systems. The next round involved problem-solving and coding on a shared editor.

The Juspay interview process is a rigorous, multi-stage marathon known for its unique focus on deep technical problem-solving rather than standard competitive programming. It begins with an online screening consisting of technical MCQs and a coding round featuring complex graph-based problems. Candidates who pass move to the Hackathon Part A, where they must solve the "Tree of Space" problem—an N-ary tree locking system—within a strict 3-hour window. This is followed by the grueling Hackathon Part B, an 8+ hour marathon conducted via Slack where candidates must optimize their previous solution and make it thread-safe without using standard synchronization primitives like mutexes or semaphores. The process concludes with a series of technical interviews that dive deep into OS fundamentals, concurrency, and high-level system design.