Aqr Capital

Round 1: Online Assessment(20 MCQs + 2 Coding Questions) MCQs: Based on DBMS, OOPs, and OS (no aptitude questions). Coding: Easy–medium level, solvable within time if you stay calm. Round 2: Technical Interview 1(Just the next day after the online assessment we have our interviews started.) This was a technical interview round. I was asked questions related to core CSE Subjects like critical section, paging, virtual functions, deadlock,caching,Joins, Normalisation, etc., and some questions related to my resume also like the tech stacks used and some concepts related to those tech stacks like props, state, JWT, JSON, etc. (No DSA questions) Round 3: Technical Interview 2 In this round I was again asked some questions realted to my project and oops questions like multiple inheritance, diamond Problem, etc and 1 scenario based problem that is I have different types of customers and I have to design different kinds of login methods for them so i have to design a class structure for it in Notepad, and then some follow ups on this question only. Round 4: Technical Interview 3 This was the final round for most of us . In this i was given a coding question which i have to code in any code editor. The Question was that we have a binary tree, and for each node i have to find the sum of the subtree that is rooted at that node. Then further follow ups were there like In the company data changes very frequently, So new nodes might be added or deleted from the tree in every second then how will u optimise the solution. And some questions related to projects were also asked.