Talk with recruiter -> hiring manager -> first technical phone interview
The question was pretty simple, implement two functions read() write() and optimize for reading.
Involves some nested hashmaps (at least that's the solution I came up with).
The interviewer asked some follow up questions on what might happen if the write is massive so we cannot store the writes in some variable in memory.
Interviewer seems satisfied with all of my implementations & answers since each time I gave an answer, I make sure that the interviewer understands and agrees with the approach.
We ended up running out of questions to ask while there are still 15 minutes left. So I asked some random questions on twitter tech stack.
Got a rejection the next morning - really confused, recruiter would not give feedbacks. Easy interview overall, really curious what happened.