HackerRank challenge followed by a phone screen. I answered each and every question that the interviewer asked.

Topics covered included finding the median of a data stream, the difference between processes and threads, the internal implementation of a hash table, and the Singleton and Factory patterns.

I was also asked about my previous internships.

I answered everything perfectly, but unfortunately, I received a rejection email the next day. I had high hopes for this interview.

Process, threads.

Design patterns:

• Singleton
• Factory

Implementations:

• Hash table
• Priority queue