It consisted of multiple rounds. At one time multiple interviewers together. Asked how to optimize c++ questions. And basic knowledge of hashing. You also need to know difference between difference pointer types.

The interviewer was hot-tempered and rude. While elaborating on my experiences and interest, I was shut off by him on multiple occasions. He seems to be in a rush / lousy mood. I got insulted when I asked him about their tech stack. He kept asking me why I wanted to join this firm and that the pay is low. In a gist, I had a panic attack during the interview and never felt shittier than this. Please apply to other firm instead. Save your time, and mental health.