I appeared for the HR round. The test was a HackerRank test; it was not easy, but not very hard. Ensure that every single case, as mentioned in the question, is handled.
During the HR round, I was told to work on making my communication concise.
The following metrics were computed from 1 interview experience for the Optiver Software Developer role in India.
Optiver's interview process for their Software Developer roles in India is extremely selective, failing the vast majority of engineers.
Candidates reported having very good feelings for Optiver's Software Developer interview process in India.