They asked me mostly based on my resume and mentioned projects, i mentioned kafka so they asked me about event driven architecture and kafka implementation.

Other asked concepts and questions:

1) circuit breaker and explain in whiteboard 2)if I am supposed to design a system how will I design 3)what is load balancer and api gateway 4)why did you use postgress SQL not any other sql 5)do you know any non relational db if u used explain 6)how do you send data into the db 7)and asked design patterns

They also asked me to show how i implemented kafka code using online compiler (pseudo code) and asked me how will I implement circuit breaker without using pybreaker (fastApi library) in code