I received a phone call from a recruiter, who found my profile on LinkedIn. The recruiters were polite.

I had a first-round onsite interview and was subsequently invited for a second round.

The questions were of easy to average difficulty, assuming some time was spent brushing up on basic algorithms (from arrays to graphs). Therein lies the problem: the questions were not challenging. I answered all questions with efficient solutions. There was no indication whatsoever from the interviewer if there was anything wrong with my solutions. However, I suspect that because I couldn't finish in time to run through a couple of examples, I was rejected. They don't offer any grace period; if there's no time left, they end the interview abruptly. I suppose they want to be fair to everyone.

There was absolutely no feedback from any of the interviewers during the process, making it hard to understand what they are looking for, or if anything is going wrong. This was also true for the system-design portion.

In my case, it looked like the decision was already made before lunch. The interviewers for the last round seemed completely uninterested. One of them was typing on their laptop continuously while I was presenting my solution.

I'm sure they are able to find people who can code the solution in time. In my opinion, for most, this is only possible if you have already coded the same or a similar problem. There are tons of websites that list such questions. Just spend enough time practicing coding them.

The interviews are less about problem-solving ability and more about finishing the code in time. This process has worked for them, and they will continue to follow it. Keep practicing writing the code; if you are lucky, you'll get one of the questions you are already familiar with.

There was no feedback from the recruiter except that I didn't get through.

The recruiter will send a link to websites that are meant to help you in preparation. If you spend enough time practicing those questions, you can get through. Spend enough time writing code. The questions are not hard.