Worst interview experience I ever had:

Swiggy HR called me for an interview on a weekend. First, there was one machine coding round that needed to be completed in 1 hour and 30 minutes. They made me wait for the next 3 hours without giving any details of the next rounds.

After 3 long hours of waiting, someone came to check the solution to the problem I solved on my laptop. He asked a couple of questions about my approach. After that, he tested my code against some test cases. My code gave the expected output.

After that, he asked me to wait for further rounds. I waited for almost 2 hours after that. Then, HR came and asked me to leave for the day. When I asked her for feedback, she said, "I don't have any feedback for you."

Seriously, they are very unprofessional. They will call you just to waste your time.

Advice to management: Please don't waste other candidates' time. If you are going to hire only Amazon and Flipkart employees, then be upfront about it.

Implement topological sort from given dependencies.