OA Round: (approx 200 participants shortlisted based on branch + cgpa)

Q1 - https://leetcode.com/problems/longest-balanced-substring-after-one-swap/description/ (exact same, solved all TCs)
Q2 - advanced BS ques based on inclusion exclusion principle (solved half TCs with brute force and hardcoding visible TCs)

There were 20 MCQs - cs fundamentals

Tech Round 1: (17 people shortlisted from OA)

First 20 mins intro + resume discussion
Q1 : RandomizedSet design - did comfortably in 25 mins
Q2 : https://leetcode.com/problems/set-matrix-zeroes/description/ (solved comfortably in 15 mins, but could not discuss one edge case due to no time left)

Tech Round 2: (6 people shortlisted from R1)

First 45 mins DSA problem, was given a story, boiled down to return minimum size of a subarray having sum >= K , variant of this problem : https://leetcode.com/problems/shortest-subarray-with-sum-at-least-k/description/, optimal is monotonic deque, but could only give a heap solution, giving TC O(nlogn).
Remaining 15 mins were discussion about hackathon project, some questions on DBMS (indexing), an SQL query, a basic question about thread pool and its advantages. Went good but not as good as round 1.

HR Round 3: (3 people shortlisted)

10 mins discussion about SIH and its project mentioned in my resume, basic HR questions related to teamwork, what I know about the company etc.

Everything ended on a positive not for me, but....
Next day the results came and only 1 out of the 3 coming down to HR round was selected and I wasn't one of them :)
Nevertheless, got a confidence boost as this was my first proper interview loop and I feel I did good. Hopefully the next experience I post will be of selection ✌️