Applied through referral. Got direct interview call. 2 rounds : 1 Data Structures [Medium to Hard Question on Hackerrank ] 1 Low Level Design [Design Patterns required] Brush all the generic questions of all DSA questions thoroughly.

I was reached out by the recruiter for their Noida office. The interview joined the call late and was in a hurry he was sweating(which doesn't affect me much we are all humans) he didn't spend much time introducing and directly we jumped to the question was around DFS on trees I told him the direct answer and data structure I would use but I think he was either busy in some work or not listing carefully, he asked me to think harder I gave him another approach he seemed disinterested and asked me to code it directly I coded the answer since we were already running short on time I just wanted him to understand by approach I coded it and he kept telling me this wouldn't return anything and asked me to check it I checked it and give him a dry run quickly and then the time was up. He asked if I had any questions he told me I returned the variable name wrong(spelling mistake) which kind of pissed me off since it was a text editor and i was under pressure with no fault of mine.

Test followed by 3 technical interview. Test consisted of medium coding questions + Aptitude. Interview consisted question from ds and algo including concept of dp and trees. apart from this, a big focus was on Operating Systems.