How i received test link?
Applied directly through linkedin job opening, received call within 3 days of hitting easy apply

Online coding test (60 minutes)
2 coding question, both LC easy/medium
completed both questions in 12 minutes

received call within 3 days for scheduling round 1

Round 1 (DSA round)

Question: https://leetcode.com/problems/minimum-edge-reversals-so-every-node-is-reachable/description/
Came up with optimal solution within 10 minutes, completed with solution within next 15 minutes.
ran the test case wasn't able to find mistake in solution.
Both me and interviewer were confused, then after 20 minutes found that i have used mistakenly wrote "i" instead of "j" and then solution worked perfectly. Next 15 minutes we had discussion over Sumologic

Interviewer was really very friendly and supportive, never saw anyone indulged in coding interview that much

Rating: Hire

Received call on the next day for scheduling next round

Round 2 (Problem Solving Round)

Question1 :https://leetcode.com/problems/course-schedule-ii/description/
completed the question within 15 minutes
further he asked me to used multithreading, I told him various approaches, around 3. He agreed with them but wanted an approach more better than those 3 which i discussed.

Interviewer was very friendly and helpful, really enjoyed this interview

Rating: Hire
Received call in 5-6 hours for scheduling next round

Round 3 (Hiring Manager Round)

Discussed past projects, scaling issues, multiple approaches. How can we monitor failures in the project. He was satisfied with my answers.
Later He asked me to write code for insertion in a binary tree, completed it in 5 minutes
further he asked to write this for concurrent environment.
wrote down code for 2 different approach.
He was quite happy with the solution

Rating: Hire
Received call in 5-6 hours for scheduling next round

Round 4 (Behavioural Round)
Started with discussion on project. Later he gave me a problem to design a system of folder directory, where opening a folder might have millions of files/ folder within it.
I messed up in started but later on gave him a solution to which even i was very impressed of, that i literally designed a good system. He also appears to be satisfied.

I was very sure of receiving offer from the company, that even told my fellow teammates regarding my interview.
Called recruiter for asking time they will share the results, they asked for 1 week

Received rejection in next 4 days
Was really very sad for 3-4 hours, but then remembered "Whatever happens, happens for good"

Received call from recruiter next day, as i asked for feedback
She said that my interviewer's feedback is : "He wasn't able to answer even simple questions". And this was the time where I got really frustrated.

But still i was happy with my solution, will try to learn more approaches.

Thanks, please upvote