It was scheduled in October 2026 and HR had set the expectation for 4 rounds, 3 being DSA rounds and one Hiring Manager+LLD.
But, in the first round itself I was asked a design problem Twitter with requirements like create tweets, follow, unfollow and see top 10 news feeds of users sorted chronologically on the basis of timestamp.
I had implemented the methods designing class structure with all parameters user_id, tweet_id, timestamp and was writing methods follow, unfollow, see newsfeed with in-memory data structures as thought it was a dsa round.
Then, I was asked to implement it with database, and was not allowed to write untill clear with indexing and the schema for all the methods so make sure that you are practicing these things also while practicing LLD.
Verdict: Rejected
